The Diddies have got holiday jobs at a local biscuit factory, sweeping the floor. However, when an argument about what makes the best biscuit goes out of control – is it a custard cream or a jammy ring? Dick and Dom smuggle their way into a biscuit factory to make the ultimate biccie – the Jammy Custard Creamy Ring. Yum. Along the way they’ll run into Gordon Ramsay, on hand to make a new biccie of his own, and Stormzy, the ultimate biscuit wrapper. When Security, Gal Gadot, earning some extra cash between DC movies, catches up with them it transpires she has her own very specific ideas on what makes the best biccie. They’d better listen and get it right, she seems very angry.