Set after the postwar collapse of an interstellar empire, a young orphan girl embarks on a quest for violent retribution. Six years old when her mother was killed, Buttercup endured an unforgiving adolescence on the streets of her home city. She's scraped by ever since, always searching for the man responsible, knowing one day she'll find him.

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...