Crockett's latest romance with a respected businesswoman (Melanie Griffith) turns sour when it is revealed that the woman is actually a high-class madam with connections to a notorious money launderer (George Takei).
Tubbs finds out that his ""raffle prize"" --- a week in the Caribbean --- is set up by a vengeful con and the Calderones to lure him out of his jurisdiction.
Castillo is not the only one to realize that a series of prostitute murders matches the M.O. of killings in Vietnam in the early 70s; the cops get help on the case from a man claiming to be a Vietnamese inspector.
Zito reluctantly uses a boxer as bait to help the vice squad nail a former drug kingpin involved in bookmaking; it ends in tragedy and the loss of a comrade for the vice cops.
Crockett's Vietnam journalist buddy, Ira Stone, is back--claiming to have footage of a secret U.S war in Nicaragua; the trail leads Stone, Crockett & Tubbs to Maynard a.k.a. the elusive Captain Real Estate.