Sixteen-year-old Tamurlaine is approaching her coronation, the day when she will officially assume rule over the Kingdom of Balthasar, a magical land where teenagers have the power to turn dreams into reality. But an assassin is preparing to kill her at the ceremony, and no one can stop him because he is sneaking into Balthasar from another universe - ours.

Tamurlaine must get help from her only friend in our universe, Toby Porter, a 14-year-old boy living in a small town in England. The trouble for Toby is that the coronation is only a week away, and he has no idea where the killer is hiding.