Still healing from his near-death ordeal and experiencing Mac's ghost, Thomas is surprised when Higgins hands over his estate duties to be able to take some time off; in a bizarre twist, Higgins starts living the fast and loose life, wears loud Hawaiian shirts and becomes irresponsible, while Thomas assumes Higgins' stuffy personality and ways, going so far as to wear a suit; curious about Higgins's sudden change in personality, Thomas investigates and discovers that Higgins is seeing a woman on the sly, and becomes concerned that she is taking Higgins for a ride.

Lieutenant Tanaka is murdered while working undercover. The official Police report states that Tanaka died in a car accident, but Thomas believes that something is being covered up, and sets about trying to answer the many questions about his friend Tanaka's death, uncovering switched identities and drug-running in the process...

Thomas ponders his future while paying a visit to his family in Virginia, where he unexpectedly meets his grandfather and considers an offer to be reinstated to the Navy; Thomas returns to Hawaii to ascertain whether former girlfriend Linda Lee Ellison is being stalked; Rick prepares for his wedding to Cleo; Thomas and Linda renew their relationship as he searches for her stalker; Thomas becomes increasingly certain that his daughter Lily may still be alive.

As Rick's wedding looms ever closer, Thomas continues surveillance on Linda to catch the psychopathic killer who is stalking her; T.C. faces a reconciliation with his estranged wife; Thomas gets surprising news about his theory that Higgins is really Robin Masters, as well as the true fate of Lily.