Danno is surprised when he bumps into a former flame and even more concerned when she seems to be involved in criminal activities.

When a robbed bank vault shows no signs of break-in, an inside job seems the likely solution. McGarrett's trail of clues leads him back to the builder of the vault and his wife...

When two healthy young people die mysteriously, local traditions prevent post mortems, and a strange conspiracy is gradually uncovered when Truck seems to fall under the power of a Kahuna...

A politician trying for the Senate is weakened by the murder of the man who is blackmailing him.