Stepbrothers Chip and Dave go back in time to 1885 and become entangled in a Wild West adventure. They face off against the town's evil mayor and try to find a way back to the present.

Chip and Dave return to the Wild West to fix the mess they caused the first time around and they reunite with their old friends to try and outwit the Purple Hat Gang.

Dave must rescue his stepbrother when Chip gets stranded in the Wild West. The boys get help from some unlikely allies.