Bizarre suicides have been occurring in New York. One morning, four girls from the same high school wake up exhausted and dizzy, with no memory of the previous night. At school, they discover that a classmate has taken her own life. Although classes are dismissed for the remainder of the day, the girls do not go home; instead, they are lured to a park by butterflies visible only to them. Suddenly, a man and a woman approach them, informing the girls that they all died the night before.