It's 8:35 pm on New Year's Eve, and Private Detective John Justin Mallory is hiding out in his Manhattan office to avoid his landlord's persistent inquiries about the unpaid rent. As he cheerlessly reflects on the passing of a lousy year, which saw his business partner run off with his wife, he assumes the bourbon is responsible for the appearance of a belligerent elf. This elf informs him that he needs the detective's help in searching for a unicorn that was stolen from his charge.
When Mallory realises the little green fellow is not going to disappear with the passing of his inebriation, he listens to the elf's impassioned plea that the stolen magical beast must be returned to his care by daylight or his little green life will be forfeited by the elves' guild. Join detective Mallory on a New Year's night of wild adventure in a fantasy Manhattan of leprechauns, gnomes, and harpies as he matches wits with the all-powerful demon The Grundy in a race to find the missing unicorn before time runs out!