In Greenock, Scotland, Liam is trying to make money. When he refuses to use his imprisoned mom as a drug mule, his criminal stepfather, Stan, and bitter grandfather kick him out of the house. He moves in with his level-headed older sister who has no love for their mother. Liam decides to buy a trailer for himself and his mom when she gets out of prison on the day before his 16th birthday. He comes up with a plan to steal Stan's drug stash and sell it to local junkies. Liam starts to develop the skills of a successful businessman and gets noticed by a group of big-time dealers.