When Lord Meriwell collapses and dies at his dining table, Barnaby and Penelope Adair are summoned, along with Inspector Basil Stokes, to discover who, how, and most importantly why someone very close to his lordship saw fit to poison him. When Lord Meriwell dies at his dining table, Nurse Veronica Haskell suspects foul play and notifies his lordship’s doctor, eminent Harley Street specialist Dr. David Sanderson. In turn, compelled by a need to protect Veronica who is at Meriwell Hall as David’s behest, David calls on his friends Barnaby and Penelope Adair for assistance.

Spirited debutante Lady Olivia McLeod, cherished daughter of the Duke and Duchess of Strathaven, has two interests: solving mysteries and winning the love of her rescuer and secret crush, the infamous Duke of Hadleigh. When Livy joins Lady Charlotte Fayne's charity for young ladies and discovers that it is a front for a covert investigative agency, she is thrilled. Livy dedicates herself to solving a deadly case. Little does she realize that the path to danger will also lead to her heart's deepest desire.

At birth, Mick Trewlove, the illegitimate son of a duke, was handed over to a commoner. Despite his lowly upbringing, Mick has become a successful businessman, but all his wealth hasn’t satisfied his need for revenge against the man who still won’t acknowledge him. What else can Mick do but destroy the duke’s legitimate son - and woo the heir’s betrothed into his own unloving arms.... Orphaned and sheltered, Lady Aslyn Hastings longs for a bit of adventure. With her intended often preoccupied, Aslyn finds herself drawn to a handsome man who seems to understand her so well.

Self-made civil engineer Geoffrey Brookhouse has unexpectedly inherited the dukedom of Greenwood. But he has a secret that could ruin his family. Hoping to save his timid sister from that fate, he seeks to marry her off to a respectable, protective gentleman. With the London Season imminent, Geoffrey hires Elegant Occasions to orchestrate her debut. Yet Lady Diana Harper, spirited fashion expert, proves more than he bargained for. Suddenly, Geoffrey’s sister is emerging from her shell, and he is beleaguered with social invitations and gossip!

Gorgeous, stubborn Esme Brentmor, daughter of a disgraced lord, is used to a wild, dangerous life among the tribes of Albania, to whom her father is the legendary, controversial Red Lion whose death she's courageously vowed to avenge - even if it leads to her own. Instead, her quest finds her rescued by the most unlikely (and very reluctant) hero! Lazy and spoiled, Lord Varian St. George has gambled away his heritage and lives on his considerable looks, charm and wits.