When the wife of wealthy society entrepreneur Leonard Godfrey drops dead of an apparent heart attack at a charity dinner for the new Women and Children’s Hospital, Sarah’s curiosity gets the better of her. But no one will believe in her theory that Caroline Godfrey’s death was not natural---until several more people affiliated with the hospital die of inexplicable causes.

Meanwhile, when a pregnant widow whose husband has died in a sweatshop fire asks for Sarah’s help in finding the owner so that she can sue for recompense, our feisty heroine insists on taking the case against her boss’s orders. With the help of her colleague Robert Campbell and an eager young hansom cabdriver named Eddie, Sarah goes on a manhunt for Killy Doyle, the menacing head of the factory underworld. But she can't ignore the mysterious deaths at the Women and Children’s Hospital---especially when the hospital’s Chinese chef is arrested for the murders and the Chinese community’s most powerful Tong Lord asks her to defend him.

Faced with her first criminal trial, Sarah stops at nothing to determine the killer’s identity.  But in trying to exonerate her client, she places her own life in danger. Will Sarah figure out who the murderer is, or will she be the final victim?