Christmas Eve holds some unusual surprises when Magnum, T.C., Rick and Higgins find themselves stranded on a deserted island that the Navy uses for gunnery practice. As a Navy ship looking to do a little artillery work looms on the horizon, will the night end with peace and happiness for all?

It's murder most foul when Higgins is struck on the head with a stray croquet ball right before a lavish Great Gatsby-themed costume ball is scheduled to be held atRobin's Nest. As Magnum rushes to keep things under control, some priceless jewels go missing, and an addled Higgins finds himself the prime suspect in the murder of one of the guests.