Tadeo would love to be accepted by his archaeologist colleagues, but he always ends up messing it up: he smashes an Olmec pyramid and unleashes a spell that endangers the lives of his friends Mummy, Jeff and Belzoni. With everyone against and only helped by Sara, Tadeo embarks on an adventure-filled escape, which will take him from Mexico to Chicago and from Paris to Egypt, to find a way to end the curse of the Mummy.