Detective Murdoch investigates the death of Oliver Hoyle who is found in the billiard room of his posh club. Hoyle was part of a group of competitive puzzle solvers and he may have been killed after solving a puzzle published by Edgar Allen Poe many years ago. It appears that one of his competitors killed him to get the glory for himself. Meanwhile, Julia visits her father Lionel but arrives only to learn that her father has died. His physician, Dr. Bradley, believes he died of heart failure sometime in the night. Julia is confused, particularly when Dr. Bradley refuses to undertake an autopsy. Murdoch soon joins her and initially doubts that anything illegal has happened. He reconsiders when he learns that Julia has found a needle mark in her father's neck and a new neighbor is the beneficiary in his will.

During their honeymoon in New York, Murdoch and Ogden uncover a deadly conspiracy threatening U.S. President Teddy Roosevelt, while Brackenreid and Dr. Grace investigate a murder by motorcar back in Toronto.

While investigating a golfer's murder, Murdoch becomes obsessed with the game.

Murdoch and Crabtree pretend a murdered witness is still alive in order to catch a killer

When a player dies violently on the cricket pitch , Murdoch and Brackenreid encounter some unsportsmanlike behavior.

At the wedding of Henry Higgins and Ruth Newsome on the Newsome estate, random murder attempts on Higgens are just the beginning of the machinations happening there.

A body is found during a fox hunt - Murdoch and Brackenreid suspect a group opposed to fox hunting maybe responsible.

Murdoch investigates a murder at the Newsome Estate, which has declared itself a nation.

While Det. Murdoch deals with the irritating Newsomes caught in a byzantine kidnapping situation, Julia must decide on her response to her former hospital blacklisting her.

When a bride mysteriously collapses and dies before her wedding, Murdoch suspects she was poisoned by her perfume.