After losing to the Shumways on a noted game show, the Fustermans declare war on their former friends, and Gordon and Rick end up caught in the crossfire.

The holiday of Goomer is upon Melmac, and Larson Petty is intent on getting his gift of foam - but while trying to kidnap the real Goomer, he ends up capturing Bob Shumway in a Goomer suit. Gordon and his sister Augie must then journey to find the real Goomer and rescue their dad.