Javier and Felipe are now full-time parents to their daughters. However, the fathers discover the girls are missing something: a mother. To find her, they invite their girlfriends on vacation with a secret plan.

Sheik El Sahid has built a theme park at the underground holy City of the Dead in Egypt that an earthquake has revealed. Two American publicists are brought over to make it a success, to advertise its fantastic mechanised speaking mummies. The place soon appears to be cursed especially when the ancient mummies begin breaking free and wreaking havoc.