A history professor living in Toronto, feeling disenchanted and disconnected from his girlfriend and his routine life, stumbles upon a recommendation for a movie from a colleague. Curiously, he decides to watch it, only to make a startling discovery: an actor in the movie bears an uncanny resemblance to him. This discovery sets him on a compulsive quest to find out more about the actor. His research leads him to uncover the actor's name and address, and driven by an inexplicable urge, he decides to confront his lookalike, setting into motion a chain of events that bewilders him.

The confrontation between the professor and the actor reveals that they are perfect physical doubles of each other, despite having starkly different personalities and lives. The actor, equally shocked by their resemblance, reacts with suspicion and hostility initially, but curiosity gets the better of him. As they delve deeper into the mystery of their appearance, their lives become increasingly intertwined, setting the stage for a psychological exploration of identity, intimacy, and the unsettling feeling of facing one's double. The initial fascination with their likeness soon turns into an obsession, as they find themselves caught in a complex web of intrigue and deception, challenging their understanding of themselves and each other.