Kate, Rose, Rachel, and Claire are four New York girls who cannot recall what events transpired the previous night. While at school news spread to the student board that the NYPD found Lise's, a close friend, body left at Central Park. As the night falls, the four girls are each led by unusual butterflies to the same place and are unexpectedly approached by a woman wearing a black suit. She asks them if they can remember the previous night when all of them died.