Magnum tries to impress a beautiful ""fan"" of Robin's that he befriends, by showing her the Robin Masters estate, only to learn that she is actually a top security expect hired by Robin to test the estate's security. The security company she works for has been hired after Robin's life is threatened if he publishes his latest manuscript; and with him heading for one of three possible locations to collect some dictation tapes, she asks Magnum's co-operation in seeing that the estate is on top security in case it is the destination he's heading for. With the additional aid of T.C. and Rick, Robin's Nest is soon turned into a heavily guarded fortress, but there are parties out trying to see that Robin never makes it to his destination...

Magnum, Rick and T.C. are at a wrestling match to try and collect some betting money owed to Rick, when they find themselves in a tight corner up against some heavies, but they are helped out of the tight spot by ageing, cheerful wrestler Earl. When their new acquaintance - a former boxing champion who now wrestles in down-and-out clubs - learns that Magnum is a Private Investigator, he asks him to find him son, whom he was forced to leave many years ago. Higgins finds that he indirectly knows Earl through an old war friend, and the pair strike up a friendship, but as Thomas searches for Earl's estranged son, it begins to seem that elements of Earl's story do not completely add up...