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.
Renegade Muklukians kidnap Curtis Shumway and return him to their planet as part of a scheme to claim the throne of Mukluk. Fescue returns to Melmac to ask Gordon for help in dethroning the renegades and finding the true king of Mukluk.
Larson Petty discovers that his family has left behind a huge fortune, but it can only be turned over to the rightful heir - Larson Petty's son. The only problem is, he has no children. Meanwhile, Gordon and Rick find out that Skip was orphaned as a youth and try to find his birth parents.