Trainee meadow witch Anwen is having a bad day - which gets much worse when a dead giant falls from the sky and destroys her village. But when she examines the body she discovers something interesting. This giant was murdered, which means a killer is on the loose!

Tasked with sending a message to the giant kingdom via beanstalk, Anwen and her nemesis, trainee sorceress Cerys, accidentally find themselves whipped up into the sky and deposited in the giants' royal palace - where the king is missing. Using their perfect spy-size and witchy skills, the girls must track down his killer. But how can you investigate a murder mystery when you risk being stepped on by your suspects?