After smugglers murder three tourists, Kent Dunbar pretends to abandon his Vietnam caving expedition to protect his new love, Rebecca Devereaux. But Rebecca suspects something.

After gemstone smugglers murder three men, Kent Dunbar pretends to abandon his exploration of Vietnam’s Mountain River Cave, arranges to send the female assistants, including his new love, Rebecca Devereaux, back to the States, and enlists help from a team of Vietnam Veterans who served with his father.

Rebecca, shocked and hurt by Kent’s rejection, suspects something’s afoot. At the airport about to depart, she overhears some buff older men talking and realizes they’ve arrived to help Kent carry on his mission. Rebecca convinces her best friend, Amanda, to stay and when the flight is cancelled, the other assistant, Bunny ends up with them as well.

Passion ignites when Rebecca and Kent reunite. While Bunny is sent to a comfortable hotel, Rebecca and Amanda join the men on the adventure. But before long a killer’s pursuing Bunny, Amanda and Tom are kidnapped, and the smugglers start wielding special powers. Will the adventurers be able to outwit the smugglers?