The Los Angeles police know that Pete Ritchie has been bringing drugs into the city, but they can't pin a single piece of evidence on him. After many botched attempts to get at the crook, they resort to having cop Madeleine go undercover and seduce her way into Ritchie's circle. Before she can get anywhere, she's abducted by Johnny, a government agent posing as a thug. But Johnny and Madeleine have no idea they're on the same side of the law.

Julia Garth, a female doctor, plans to introduce modern techniques of medicine to old Santa Fe in 1880, but is opposed by an established doctor, Rourke O'Brien.

In Colombia, mining engineer Rian Mitchell discovers Carrero, the lost emerald mine of the Conquistadors, but has to contend with notorious local bandit El Moro's gang and with coffee planter Catherine Knowland's love.

A poor, but very lucky man in the cock fighting business, is hired by a rich man, but both are in love with the same woman.

Insurance detective Steve Hastings is sent by his company to investigate the disappearance of a fellow agent. His first lead is the agent's fetching sister, Victoria, whom he trails to Mexico City. After charming his way into her confidence, Steve helps Vicki unravel the mystery.

A widower's young son leads the police to a killer of sinners in Mexico City.

American arms dealer Kennedy hopes to make a killing by selling to the "regulares" in the 1916 Mexican revolution. American mercenary Wilson favors the rebel faction headed by Escobar, and they plot to hijack Kennedy's arms; but Wilson also has his eye on Kennedy's wife. Raids, counter-raids, and escapes follow in a veritable hail of bullets.