在大城市过关五光十色生活的嘟嘟和哈哈，放暑假的时候被父母托付给住在城市边缘审核或的奶奶家。虽然奶奶很喜欢他们，但面对陌生、无聊的环境，他们产生了回家的念头。无意中闯入封存已久的地下室，遇见了猫公主小月，慌乱中嘟嘟、哈哈帮助小月顺利解决了困难，小月请他们吃冰淇淋感谢他们。第二天，嘟嘟和哈哈好不容易等到天亮，又偷偷走到地下室，看见梦想中的小月，他们欢喜雀跃地知道了昨天的一切都是真的。所有的故事也将由此展开……
The mayhem and madness continue in season three of this biting and uproarious adult animated comedy series. Wrapping up their “Eat. Bang! Kill. Tour,” Harley Quinn (Kaley Cuoco) and Poison Ivy (Lake Bell) return to Gotham as the new power couple of DC villainy. Along with their ragtag crew – King Shark (Ron Funches), Clayface (Alan Tudyk), Frank the Plant (JB Smoove) - "Harlivy" strives to become the best version of themselves while also working towards Ivy’s long desired plan of transforming Gotham into an Eden paradise.
