Stepbrothers Chip and Dave go back in time to 1885 and become entangled in a Wild West adventure; Chip and Dave 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; the boys 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.