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 Lize's body left at Central Park. Kate, who was close friends with Lise, breaks down and takes the rest of the day off. As the night falls, she and the other three girls are led by butterflys that only they can see 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.

The four girls are at the mercy of a man whose behavior sounds exactly like that of a rabid dog. The stranger is run over by a bus soon after Rachel displays a supernatural ability to break free from his grasp. Aghast and in shock all four are approached by the mysterious woman, who calls herself Lula, and explains them that are living on borrowed lives and from now on at every night they will be needed to hunt and kill demons for 'them'. If they break the contract, all will die.

Hervé and Emilio infiltrate Vivaleo Pharmaceuticals as well as Lula, Rachel, Rose, and Claire. Emilio creates a commotion in the lab to help Kate and Lise escape, but Kate won't go because she deems him a liar for deceiving her sister, Emma. Hervé goes to find Anna, but she is held in custody by his grandfather, Lauro.