Tandy is a brave and determined girl. In her native Essendor, where she lives with her foster family, things are turbulent - the beloved Queen Audrey is struck down by a strange sleeping sickness, and her sister Aletta has gone in search of a cure. Meanwhile, children began to disappear in the kingdom. When Audrey meets a strange musician at the fortress wall who tells her about a unicorn kidnapping children, Tandy realizes that she must go with him and save them. And even though the path promises to be long, and her companion is the most mysterious person she has ever met, Tandy has no doubt that she is doing the right thing. Who knows, maybe among the abducted she will find her mother, who disappeared several years ago?