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Missing gems and precious metals drive a mining community to madness as Hetty searches for buried treasure stashed by a miner killed in a cave-in. Hot on the trail of the lost loot, Geoffrey, too, is caught in an underground accident.

Robert goes undercover to help Hetty solve a case of stolen property involving a suspicious drowning. Posing as a wheelchair-bound millionaire, with Geoffrey along for the ride as his chauffeur, he finds himself at the scene of the "accident" in the company of a questionable character.

A reclusive senior is holding up a real estate deal by refusing to leave her condemned apartment building. Hetty is offered a fabulous bribe when she discovers something suspicious about the structure.

Hetty sends Geoffrey undercover when it comes to light that the owner of a local gym and fitness centre may be supplying people with dangerous anabolic steroids.

Hetty goes to visit a long lost cousin in a small fishing village near Whitby. She soon finds a client - an elderly lady who is being troubled by mysterious sounds of a dog barking. Meanwhile back home Robert plans an exposé on a local building firm - but are his facts correct - and Janet is having problems with an obnoxious neighbour who won't take no for an answer.

Robert's brother Frank comes to stay, and brings Hetty the case of a missing Victorian school ma'am.