Newly engaged Shelby John and Ruby Red want a fresh start after their struggles with addiction, but when Shelby discovers his beloved Ruby dead on their porch, he embarks on a vengeful killing spree of the dealers who supplied her. Armed with nothing but adrenaline and a nail gun, Shelby begins to unleash chaos on the town’s criminal underbelly, as he hunt’s down crime lord Coyote. Sheriff Church must race against the clock to put an end to Shelby's vigilante justice before the entire town descends into a bloodbath.
A wild, freeform, Rabelaisian trip through the darkest recesses of Edinburgh low-life, focusing on Mark Renton and his attempt to give up his heroin habit, and how the latter affects his relationship with family and friends: Sean Connery wannabe Sick Boy, dimbulb Spud, psycho Begbie, 14-year-old girlfriend Diane, and clean-cut athlete Tommy, who's never touched drugs but can't help being curious about them...