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...

Sandy, upon discovering her husband's infidelity while watching her son's birthday video, leaves the suburbs and moves into the city. She gets an apartment that's above a coffee house where she befriends one of the workers, Aram, a guy whose wife only married him so she could get a green card. Aram's family thinks he's wasting his life and education by working in the coffee house. Soon after moving into the apartment, Sandy hires Aram to be her nanny while she takes on work for the first time...