When Stocker's submissive partner, Margo, disappears and is later reported as deceased, Stocker can't bring himself to let her go. He sees her everywhere, in coffee shops, on the streets, and especially in his fantasies. Following a clue found on the back of an old business card, Stocker sets out to discover what really happened to Margo. Obsession chronicles his journey into the city's kinky world of female domination to find his lost love.