Steve discovers the Orb of Dominance and Earth Crystal, which transport him to the Overworld. After being imprisoned in the Nether by Malgosha, a piglin ruler, Steve hides the Orb and Crystal. Years later, Garrett, a failing video game store owner, finds the items and triggers the portal. Siblings Henry and Natalie, along with real estate agent Dawn, enter the Overworld where they face danger from Malgosha and her forces.

Steve teaches Henry how to craft and build in the Overworld, while Garrett searches for treasure. Malgosha sends monsters and the Great Hog to track them down. The group ventures to a Woodland Mansion to find a replacement Earth Crystal, but Malgosha's forces cause chaos, resulting in Garrett's sacrifice.

The group fights back, crafting weapons and iron golems to defend the Overworld. Henry retrieves the Earth Crystal, restoring sunlight and defeating Malgosha. In the end, they return to Chuglass, where they create a successful video game, and each character finds new purpose: Dawn opens a zoo, Natalie teaches self-defense, Henry completes his jetpack, and Steve and Garrett run the video game store.