Cosima Sanctuary is a one of a kind safe house for teenage survivors, but when they realize that one of them is a psychopath, all hell breaks loose. The hunt is on for the psycho next door.

For months Summer is trapped in a cellar with the man who took her - and three other girls: Rose, Poppy, and Violet. His perfect, pure flowers. His family. But flowers can't survive long cut off from the sun, and time is running out...