When zoology professor Cordi O'Callaghan reluctantly accepts an invitation to be a lecturer aboard the Susanna Moodie, a vessel ferrying tourists through Canada's Arctic, she figures it will be a breeze. Seasickness aside, Cordi becomes entangled in the deaths of two of her fellow passengers, both members of a close-knit fiction-writing group. The fatalities are ruled accidental, but Cordi suspects they're anything but. After Cordi returns to her home in the Ottawa Valley, she hits the trail and stirs up a hornets' nest of lies, intrigue, jealousy, and greed as she grills potential murderers, one of whom takes offense and stalks her. 2010.