American engineer Steve Corey moves to Mexico to work at one of the mining projects owned by Katherine Beckman and her half-brother Paul. He finally is introduced to Katherine, and the man that he is taking over for, Bill Maxton, informs him that Katherine is his for the taking: "All you have to do is touch her---she goes off like fireworks. There were plenty of guys before me, and there'll be plenty after me."
Steve thinks that Katherine is what he expected but ends up developing a crush on her. As their relationship develops, Paul gets upset and reintroduces her ex-boyfriend Gus Cole to her to lure her away from Steve. Half-siblings Katherine and Paul are carrying some emotional damage from the past which they need to work out.