Thea Osborne and her canine companion Hepzie travel to the isolated village of Snowshill for their next assignment, house-sitting Hyacinth House for the mysterious Yvonne Parker. Something doesn't feel right to Thea, who is ill at ease in the village, and soon her intuition is proved to be right. A local boy, Stevie Horsfall, is found brutally strangled, with his mother as prime suspect. Thea, believing in her innocence, embarks on a mysterty, taking her through the maliciously entangled lives of the village residents, to London and beyond.