She auditions for the last big unburned nightclub in town, Frankie Sebar's C-Bar Rancho, and Sebar hires her.
It turns out disturbed perfume industry millionaire Mr. Jerome is a pyromaniac. After six unhappy marriages to nightclub singers, he's cracked. He takes the term "torch singer" too far. To get his "vengeance" he sits up front and spritzes them with a mix of perfume and gasoline, and lights them on fire with a cigarette. He's in cahoots with Sebar, who had owned all the other clubs, and had big insurance policies on them.
O'Neil avoids getting set on fire, and catches Jerome and Sebar red-handed.