'Footsteps in the Sea' is the story of Helen, an apparently innocent child, whose obsession with her dead father and devotion to her mother lead to murder. When she moves to Switzerland as a teenager to live with a doting uncle, it seems she has at last found a safe refuge where the past can be forgotten. Her happiness is complete when she marries a wealthy Greek, who adores her, but soon the old ghosts return to haunt her. Cryptic anonymous letters start to arrive for her from someone whose veiled threats appear to jeopardise everything Helen holds dear.