Crims follows straight-laced Luke, played by stand-up comedian Elis James, and Jason played by Kadiff Kirwan, who both make their TV acting debut. Luke inadvertently finds himself sentenced to two years in Young Offender Institution Sunnybank View after becoming a bank robber's getaway driver, along with the bank robber in question, his girlfriend's brother and so-called friend - Jason. To make matters worse he has to share a cell with Jason. Luke will have to rely on Jason's street smarts to get him through. Unfortunately, Jason is a massive idiot.