In this first of a new series of spirited historical mysteries set in 1890s San Francisco, former Pinkerton operative Sabina Carpenter and her partner, ex-Secret Service agent John Quincannon, undertake two apparently unrelated investigations.

Sabina's case involves the hunt for a ruthless pickpocket who uses fiendish means to relieve her victims of their valuables. She strikes most often at an amusement park, in a torchlit pitchman’s bazaar, and among the crowds along the evening Cocktail Route.

Quincannon is after a slippery housebreaker who targets the homes of the city’s wealthy residents. Following the trail leads Quincannon to the infamous Barbary Coast, an oyster pirate’s lair, and a Tenderloin house of joy.

The cast of characters also includes a pair of receivers of stolen merchandise, a retired lady “dip,” an alcoholic lawyer and his wife, a mysterious carriage driver — and a man claiming to be Sherlock Holmes.

The two cases eventually connect in surprising fashion, but not before matters are complicated by two murders, assorted felonies, and the constant interference of the bughouse Sherlock — a shrewd “crackbrain” who hinders, exasperates, and nearly outshines both Sabina and Quincannon with clever detective work of his own.

A conman always has a bag of tricks, ready to fool the unsuspecting, and almost everyone is unsuspecting until they get taken. When that happens, they turn to Carpenter and Quincannon, Professional Detective Services, to recover their money and what’s left of their dignity, and perhaps even to save their lives.

When one such case leaves Sabina Carpenter the only witness to a murder, the family of the culprit vows to stop at nothing to keep her silent. The threat leaves John Quincannon deeply concerned for Sabina’s safety, but there’s no rest for the wicked and so the crime-solving duo must split up to tackle two separate con games, run by two villains with deadly bags of tricks at hand.

And when Sabina’s life is put in danger, John must rush to save her while grappling with the terrifying realization of exactly how much she means to him.

Carpenter and Quincannon, Professional Detective Services is a fixture in San Francisco at the dawn of a new century. While the future is unclear, Sabina and John know one thing for certain; they will protect their clients from flimflammers, thieves, and murderers, and do whatever it takes to run these dregs of society into the arms of the law.

Sometimes, that requires a subtle touch. Professor A. Vargas, self-styled medium extraordinaire, and his partner Annabelle, use guile and trickery to swindle bereaved men and women eager to contact the spirits of deceased loved ones. John and Sabina must not only unmask these charlatans, but also solve the riddle of an impossible murder in the midst of a séance.

Other cases involve brute force and personal danger. Such as the theft of a burglarproof safe mysteriously emptied of gold bullion. And John’s pursuit of a ruthless gang of counterfeiters, whose leader appears to be a man from John’s past in the Secret Service — a man thought long dead.

Adding spice to these exploits is Sabina and John’s personal relationship, which is rapidly progressing to an exciting new level.

In response to a string of gold thefts in a Mother Lode mine, Quincannon goes undercover as a newly-hired miner to identify and capture the men responsible.

Meanwhile, Sabina finds herself not only making plans for her and Quincannon’s wedding, but also investigating both an audacious real estate scam and an abusive young man’s villainous secret.

Quincannon’s pursuit of two con men who have absconded to Hawaii with a considerable sum of his employer’s assets dovetails nicely with Sabina’s vision of a second honeymoon.

But neither is wont to stay out of trouble, and Sabina inadvertently becomes involved in a locked room/dying message murder in Honolulu.