The residents of Sunnyvale Trailer Park attend the funeral of Ricky Robb Wells's father Ray, who is believed to have died in a propane explosion. Trailer park supervisor Jim Lahey John Dunsworth and his partner Randy Patrick Roach attend the service, despite being uninvited; the pair are forced to leave after Lahey expresses his belief that Ray is still alive.
Ricky has purchased a house in a subdivision where he keeps an upscale marijuana growing operation. Lahey John Dunsworth is recovering from a stroke, which he blames Ricky for, and vows to get revenge.
With the help of his lackey Jacob Collins who is now serving in the Canadian Army, Julian John Paul Tremblay has developed a new money-making scheme in selling drug-tested urine. Bubbles Mike Smith has been living under J-Roc Jonathan Torrens and Sarah Sarah Dunsworth's trailer step for two years due to not being able to find work. J-Roc and Sarah later plan an intervention and tell Bubbles to move out. While Bubbles is packing his things, he receives a letter from Randy which he hangs on to. Bubbles is later attacked by thugs while delivering chicken and sent to the hospital.
Julian warns Ricky that with the potential legalization of marijuana, his growing operation business will become obsolete. Ricky refuses to work for Julian and vows to go to Parliament Hill in Ottawa to protest the upcoming legal action. After visiting Bubbles at the hospital, Julian asks him to work for him. Bubbles accepts after revealing that his letter was from a lawyer saying that his deceased parents left land and a house for him in Kingston. Julian promises to take Bubbles to the place after they finish the job. Jacob later reveals that he has been dishonorably discharged from the Army. After Jacob's father Phil rages at Julian, Bubbles, and Tyrone — who recently ran away from a halfway house — the three steal Phil's food truck, "The Dirty Burger," and make their way to the urine deal, with Julian letting Bubbles drive a separate van. Bubbles then offers Ricky a ride to Ottawa after the transmission in Ricky's car fails.
Lahey and Randy secretly follow the boys on their trip, with the intent of planting cocaine in their vehicles and framing them. While on the drive, Lahey tries some of the cocaine and quickly becomes addicted, which worries Randy. While Bubbles and Ricky are driving in the van, they drive by the now-burned down Dirty Burger and watch as police arrest Tyrone; they pick up Julian before the police can find him. Later, Bubbles purposely drives past the turnoff to Montreal where the deal is supposed to happen. When Julian finds out, Bubbles admits that he does not want to be a part of the scheme anymore, and just wants to go to his parents' land. Once they get there, it is revealed that the home of Bubbles's parents is a rundown bus parked next to a lake. Bubbles opts to live there, despite Ricky and Julian's protests; however, at the last minute, he decides to go back with them.
Once they arrive at Montreal, Bubbles and Ricky go to a strip club while Julian waits for his customers; he is then robbed by his arch-rival Cyrus and his accomplices Dennis and Terry. Randy calls the bomb squad on Julian's van, and they discover cocaine in the wheel well. Julian is arrested, but Bubbles and Ricky manage to get away. After finding Lahey and Randy, Bubbles steals their car and drives Ricky to Ottawa. Once at Parliament Hill, Ricky sneaks his way into the building and makes an outrageous speech which gets him pulled out by security. A lawyer then offers to help get him out of jail quickly and obtain a marijuana license. While a police officer takes Ricky and Bubbles away, Lahey, highly intoxicated on liquor and cocaine, knocks the officer unconscious and fights a handcuffed Ricky. After the officer regains consciousness, he tases Lahey.
Now in jail, Lahey reveals that the taser shock reversed his stroke. He is no longer using cocaine and has started a relationship with his cellmate. Bubbles has his parents' bus taken to Sunnyvale where he now resides. Julian has stopped dealing drug-tested urine and has started a relationship with an unnamed woman. Randy has revealed that he is over Lahey and has gone back to hooking. Ricky reveals that his marijuana growing operation is a success, since he is now able to sell marijuana legally. He receives a letter containing a VHS tape, which reveals that his father Ray is still alive and now living in a landfill site in Florida, having performed a life insurance scam.
