In 1977, an Alaskan summer vacation for Constable Alex Houston and her partner Silver is interrupted by an emergency call for help. A massive rockslide on the famous Chilkoot Trail has scattered a troop of Canadian Girl Guide backpackers, one of whom remains unaccounted for.

It is 1977, and the mysterious appearance of old artillery shells on a beach in northwest British Columbia is having disturbing effects on the kids that find them. Constable Alex Houston, her partner Silver, and Canadian Forces Lieutenant Don Harrison are sent into danger once more.

In 1978 a Soviet spy satellite veers off course and explodes over Canada’s north. When Constable Alex Houston and her partner Silver begin searching for one of the satellite’s top-secret components, aircraft malfunctions and the Arctic cold are the least of their problems.

Constable Alexandra Houston sets out on a cross-Canada train journey. Against a backdrop of beautiful, constantly-changing countryside, strange behaviours on the part of some passengers resolve into break-ins, intrigue, and a growing certainty that quite a few people on the train are not who they seem to be.

A chance encounter with two suspicious characters leads Corporal Alexandra Houston from British Columbia to Newfoundland and Labrador, on the trail of a professional agitator whose appearances at organized protest events seem to coincide with a trail of violence, injuries, and death.

When Corporal Alexandra Houston is invited to a family funeral on Cape Breton Island, she learns about an ancient family curse. When a murder is discovered, she has to move quickly if she is to find the key to a string of strange occurrences and identify the killer, before another murder takes place.

When Corporal Alexandra Houston is invited to a family funeral on Cape Breton Island, she learns about an ancient family curse. When a murder is discovered, she has to move quickly if she is to find the key to a string of strange occurrences and identify the killer, before another murder takes place.

When a young American woman barely escapes being kidnapped, Alex and Silver are assigned to protect her from some surprisingly persistent and well-informed pursuers. To buy time, they hide out in a secret, underground military installation, but they soon find themselves under siege.

Alex, her fiancé Don, and Silver visit a ski lodge high up in the Canadian Rockies but their vacation is threatened by a snow-storm that cuts off both power and access to the lodge. While they wait-out the storm, a suspicious death puts Alex on the trail of a murderer.