In a world where puppets and humans live side-by-side the puppet stars of the iconic TV show The Happytime Gang are some of the biggest celebrities around. But off camera, the family-friendly cast leads the kinds of lives that would make a tabloid writer blush. When the stars of "The Happytime Gang" are mysteriously murdered, two mismatched detectives - one a type-A, take-no-prisoners human with a secret, and the other a crass, hard-drinking puppet with a connection to one of the victims - must put aside their huge differences to stop the killings and catch the culprit, while resisting the temptation to murder each other.