Dave and Ward provide discount childcare in an unruly backyard in the Harlem Valley. Recent immigrants Hyeon-Joo and Eugene, and their Korean-American cousin Casey, are dropped off one day after school. As Hyeon-Joo and Eugene assimilate to American traditions, Casey fends off taunts and insults from the locals. When Ward punishes Dave with an unusual afternoon activity, it triggers unexpected reactions among the kids.