After 18 months in jail, our Trailer Park Boys, Ricky and Julian , head back home to Sunnyvale Trailer Park aiming to get their lives back together again. The problem is that neither Ricky's fiancee Lucy nor his dad Ray will let him back into their homes, and some guy named Cyrus has moved into Julian's trailer, having crowned himself the new "King of the Park".
Fed up with all their demands and complaints, Julian tells everyone that he is leaving the trailer park. Ricky, who has been living in Julian's car on his front lawn, has one week to find a new place to live. Mr. Lahey, the trailer park supervisor, is thrilled to hear of Julian's imminent departure but when he hears that Ricky won't be leaving too, his worst nightmare seems about to come true.
In desperate need of $2,000 to buy some hydroponics gear for his dope-growing business, Ricky reluctantly agrees to star in one of J-Rock's amateur porn films to be shot in J-Rock's trailer. Ricky, however, isn't quite up to the task, and the video, entitled "From Russia With The Love Bone", eventually winds up in Mr. Lahey's possession. Julian must convince Lahey that using the tape against Ricky would not be in Lahey's best interest.
While babysitting both Trinity and Mrs. Peterson's dog, Ricky accidentally gets shot and the dog devours a tray of hash brownies. A vet treats both the dog and Ricky. In order to pay the vet, Ricky and Julian must repossess a lawn tractor owned by a former patient who hasn't paid the vet's bill. The Boys successfully recover the tractor -- but not before Ricky gets shot for the second time that day.
With Ricky's life still a mess, Julian tries to convince him that it's time to marry Lucy. Reluctant at first, Ricky changes his mind when Julian suggests that people will always think that Ricky is gay unless he marries Lucy. Julian's engagement present to Ricky is the '76 New Yorker, which for weeks was up on blocks in his front yard, and is now made operational thanks to a few purloined replacement parts.
Lucy insists that Julian take over the job of organizing her wedding: which is odd since Julian isn't the groom, Ricky is. She wants lots of people and lots of food. The people part will be easy but getting that much food will be difficult on a tight budget. Julian's plan to hit a local grocery store runs into a snag when Ricky unexpectedly shows up in the middle of the heist. Shots are fired. The next day, the cops show up uninvited to the wedding.
When Ricky gets a job as a mall security guard, he puts Julian's dope-growing operation at risk and tries to arrest Bubbles for stealing shopping carts.
Sam Lasco is set to marry Barb which Julian realizes would be worse than Lahey. Julian sets up a trap that works (mostly). When Cyrus & Lasco come back to Sunnyvale for revenge, the boys take the dope filled Airstream on a long police chase through the countryside.
Ricky wins the new position of Temporary Relief Assistant Trailer Park Supervisor as Randy is suspended. He then must choose his loyalty to his friend or to his new boss.
Bubbles is dissapointed when he's not able to get Rush tickets. This prompts Ricky to pay Alex Lifeson a visit and convince him to play a private concert.
Julian comes up with a plan to "remarket" barbeques. Ricky thinks it's a good idea to get his daughter, Trinity, and her friends in the Junior Achievers' Program to steal the barbeques since they are minors and won't go to jail.
Lahey loses his mind on the anniversary of his dismissal from the police force. He puts on his old police uniform and tells everyone in the park that he is a police officer again. He shoots at Ricky and ultimately imprisons Ricky and Julian in a homemade shed-jail.
Ricky gets pissed off at Julian for giving Erica his ticket for the cruise, get`s kicked out of the park, and proceeds to go on a crime spree in an attempt to get sent back to jail.
Julian gets out of jail only to discover that Ricky is the new supervisor of Sunnyvale Trailer Park. Ricky and his assistant, Bubbles, have been carrying out various illegal activities.
Broke, trailerless and without rum, Julian decides to leave the park and ends up living in his car in an alley. Meanwhile, Randy will do anything for a store-bought cheeseburger.
Bubbles has an infected tooth and the only way to get him to a hospital is with the help of his old childhood friend: a ventriloquist doll named Conky.
In a prequel set in 1997, Julian has a money-making idea: "remarketing" Christmas trees, lights and gifts. A trailer decorating contest gives the winner gets a big-screen TV (also stolen).
The boys hide all of the hash by using it to pave Ray's driveway. Ray's addiction to gambling and liquor gets worse. Ricky barbecues for his family—with devastating effects.
Ray who is living in his truck sleeper disposes of his urine just like a trucker. Julian has a new plan to make money. Randy goes out on his own. Bubbles makes plans for his kitties.
Sunnyvale is finally going to get some publicity for their new "Convenients Store" and Bubbles "Kittyland" as a TV reporter comes to Sunnyvale. Lahey goes to the dump and finds something surprising. Randy has a new fan.
Randy power trips as he tries to clean up the park. Lahey tries to get incriminating evidence against the boys, and finds just the thing he thinks he needs to get back on the police force.
The boys try to profit from their latest scam of selling the meat that they have stolen from the grocery store. Meanwhile, Lucy is pregnant and Julian accepts a new job that is beneath him.
Ricky realizes that he cannot be the father of Lucy's unborn baby, so he makes it his mission to discover who is the real father. Meanwhile, J-Roc organizes a gang of thieves who are stealing luggage at the airport.
The boys use Bubble's love for model trains when they make a plan to smuggle marijuana across the border into Maine. They send a team consisting of Jacob and his "crew" to scout the location, however the scouting team goes missing.
On a mission to find Jacob and his crew, the boys leave the relative safety of the trailer park for a dangerous adventure in the woods on the Maine border.
Randy and Phil Collins go into business together, opening a restaurant called "The Dirty Burger". Meanwhile, Barb Lahey finally finds out who is her secret admirer.
After Bubbles discovers that he is wanted by the police, he dons a disguise. Meanwhile, Randy and Lahey get back together. and then plot to turn in Bubbles and collect the reward money.
When the boys find themselves in trouble with the authorities it is up to Ricky to bargain for a deal. But, someone has to go to jail. Who will take the fall?
One year after the boys successful "Train Scam" on the Maine border. and the boys and their money are soon parted. Penniless again, they have to deal with Lahey who has a brilliant new plan to evict them from Sunnyvale forever.
Julian enlists J-Roc and Sarah's aid to turn his bar into a strip club. Ricky is not pleased and in utter shock when he finds out that his daughter Trinity is pregnant.
Local TV celebrity Steve Rogers returns and rents Julian's bar for his stag party, which gets of out hand and overflows into Bubbles's Shed-and-Breakfast sheds.
Bubbles blames Ricky and Julian for getting him community service, so he makes them come along and help put on a "don't do drugs" show for kids. Mr. Lahey gets some relief from the tablets Julian provided, but Randy finds out.
