When Higgins unwittingly causes Magnum to wipe an expensive computer game loaned from T.C., and Thomas accidentally erases a chunk of Higgins' memoirs stored on the computer, a feud breaks out between the pair. Magnum is trying to break a major, crooked gambling ring that is operating on the islands, but it is none too easy while in the middle of the falling out with Higgins, which starts out with each trying to out-do the other with ""eye-for-an-eye"" practical jokes, and quickly develops into a particularly bitter battle of one-upmanship...

Thomas lies hospitalized in a coma, caught between life and death, after being shot; as his friends and family attempt to pull him out of the limbo in which he is trapped, Thomas has an out-of-body experience in which he sees himself in heaven, guided by Mac; Thomas recovers physically from the gunshot wound in time, but finds it hard to face life again; although three of the criminals who almost killed him are already dead, one is still free.

Magnum prepares for the trial of Quang Ki, who attempted to kill both him and his family. But when the case is suddenly, unexpectedly acquitted, angered Thomas suspects some other hand is behind Ki's release. It becomes evident that his arch-nemesis will stop at nothing to destroy Thomas and his family, when he receives a video-tape containing terrible information about the fate of his former wife and young daughter. As Thomas plans his revenge against Ki, he is thrust into a quagmire of intrigue endangering a sensitive P.O.W. prisoner exchange programme...