Teen Maddy Smith (Aimee Kelly) has a secret - she's a Wolfblood! Neither completely wolves nor humans, Wolfbloods have great powers - super speed, strength and senses - and can change from one form to another. Just as Maddy's getting ready for her first transformation, a new boy, Rhydian (Bobby Lockwood), starts at her school - and they both instinctively know their true nature.