When Will accidentally creates a mysterious portal during a trip to the zoo, he's transported into the world of the Night Zoo, and thrust into an incredible adventure. Joined by his friends, Sam and Riya, Will journeys to the eerie Igloo City. It is a strange place where the animals follow strict rules put in place by their leader, Circles the owl. Circles is determined to stamp out any rule breakers and wants Will to track down a group of rebels. The safety of Igloo City depends on Will making the right choice: should he follow Circles' orders or disobey them by joining the rebels?