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...

There is a house, notable for its lack of any interesting feature, that serves as home to four tenants. The last of these leads the reader down corridors of mystery and wonder. There's something about that place that makes him feel all is not well with his fellow housemates, none of whom he has ever seen. Pressure is put on him to find out more and his curiosity takes him down a path on which, once started, there is no turning back.