After a family tragedy, Jacob feels compelled to explore an abandoned orphanage on an island off the coast of Wales, discovering disturbing facts about the children who were kept there.

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

Scooby-Doo, Fred, Velma, Daphne, and Shaggy are all trapped in a spooky castle surrounded by ghosts, witches, and mummies with no way out.