Gotham City is under siege by a series of bizarre crimes and only the world's greatest detective, Batman, can unravel the mystery! The trail leads to none other than the Penguin and his Animilitia, an animal-inspired squad of villains including Silverback, Cheetah, Killer Croc and the monstrous Man-Bat.

The series is set during Bruce Wayne's early years as the Batman, following his initial period of battling organized crime. Over the course of the season, he hones his skills with the assistance of his butler, Alfred Pennyworth. Bruce is introduced to Alfred's goddaughter, Tatsu Yamashiro. Tatsu is a martial arts swordsmaster hired to act as Bruce's bodyguard, but also recruited to act as a superhero partner to Batman.