A once-celebrated kid detective, now 32, continues to solve the same trivial mysteries between hangovers and bouts of self-pity. Until a naive client brings him his first 'adult' case, to find out who brutally murdered her boyfriend.

After he's attacked on the street at night by a roving motorcycle gang, timid bookkeeper Casey (Jesse Eisenberg) joins a neighborhood karate studio to learn how to protect himself. Under the watchful eye of a charismatic instructor, Sensei (Alessandro Nivola), and hardcore brown belt Anna (Imogen Poots), Casey gains a newfound sense of confidence for the first time in his life. But when he attends Sensei's mysterious night classes, he discovers a sinister world of fraternity, brutality and...

A young runaway girl hides out in the barn of a retired horse trainer and forms a bond with his troubled filly.