Tadeo would love for his fellow archaeologists to accept him as one of their own, but he always ends up messing things up: he destroys a sarcophagus and unleashes a spell that puts the lives of his friends, Momia, Jeff, and Belzoni, in danger. With everyone against him and only Sara to help him, Tadeo embarks on an adventure-filled escape to find a way to break the mummy’s curse.