The Addams family of Musutafu has never cared what anyone thinks of them. Not when the neighbors call them creepy. Not when their children play with piranhas. And certainly not when family dinners occasionally involve sword fighting. For Katsuki Bakugo Addams and his beloved wife YN, life couldn’t be more perfect. That is, until a mysterious stranger appears claiming to be Bakugo’s long-lost brother. As the family eagerly welcomes him into their home, YN becomes convinced that something isn’t right. Between dark family traditions, dangerous games, and a conspiracy surrounding the Addams fortune, the Addams family is about to face their strangest challenge yet. After all, nobody messes with an Addams.