The film continues the story of teenage Billy Batson who, upon reciting the magic word "SHAZAM!" is transformed into his adult Super Hero alter ego, Shazam.

As a group of friends discover plans for a time machine, they build it and use it to fix their problems and personal gain. But as the future falls apart with disasters, and each of them disappear little by little, they must travel back to the past to make sure they never invent the machine or face the destruction of humanity.