Mai and her friends has an unseparable bond since childhood. But as of late, their friendship is questioned when their romantic relationships get in the way of others. But before Mai can make amends, she is unfortunately killed in a traffic accident. Distraught with her death, Mai's father implements his ongoing research of recording a person's memory into a microchip.

A group of high school girls discover the truth to an urban legend when one by one, each begins to die under mysterious circumstances after witnessing a black hooded figure. Who is the black hooded figure and will these girls be able to escape death?

Set in New York City, this appealingly madcap Japanese comedy turns the stereotype of the hard-working Japanese in America on its head. Featuring amusing sight gags, winning lead performances and over-the-top caricatures, Sleepy Heads tells the tale of young illegal Japanese immigrants happy to be free from Japan's intense work ethic and traditional hierarchies.