Nikki's just found out that her long-lost father is the demon king of the Shadowlands, the world that separates and protects us from the Underworld. When she is brought there by the mysterious - and surprisingly cute - messenger Michael, she learns that her father is dying and wants her to assume the throne. To complicate matters, a war is brewing between the Shadowlands and the Underworld, her half-demon qualities are manifesting, and her growing feelings for Michael are completely forbidden. And back in 'our' world, the Winter Dance is looming. What's a teenage demon princess to do?