There is a mansion in the middle of nowhere called Vendetta House, tasked with the sole purpose of taking in kids like Ariel: Cambions, the offspring of demons. The day that Ariel turns eighteen, she not only discovers her abilities as a Cambion, but she is taken to Vendetta House, kicking and screaming. Gifted with telekinesis, telepathy, and elemental control, demon-bloods are removed from society for their own good, or so Ariel is told. But Ariel has bigger problems than her hostage situation. An abandoned section of Vendetta House hosts hundreds of dead spirits, ghostly remnants that only Ariel and another strange boy can see. Since her arrival, the dead numbers have been rising, and coincidentally, kids within the House are going missing too. With the help of her new friends, Ariel must uncover the secrets of Vendetta House, or before they know it, they may just disappear too.

Hadley Jamison doesn't know what to think when she hears that her classmate, Archer Morales, committed suicide. She didn't exactly know him, but that doesn't stop her from feeling like there was something she could have done to help him. So to Hadley's surprise, on the very night of Archer's funeral, she has a run in with Death himself and is offered the chance to go back in time to stop Archer from ending his life. The catch? She only has twenty-seven days to do it. And if Hadley doesn't succeed? Well, she doesn't want to think about that.

Archer Morales's life is finally perfect. He's married to the girl of his dreams and finally has a job he enjoys. But when something completely unexpected happens, Archer discovers that his wife, Hadley, has been keeping secrets, and that his past isn't going to be staying in the past for much longer.