Jonathan is a young man leading an unusual existence; he shares his body with his twin brother, John. By day, Jonathan controls their shared physical form and works diligently as an architect while John takes over by night, living a contrastingly adventurous lifestyle. Their coordination relies heavily on recorded video messages they leave for each other, maintaining strict boundaries to avoid complications in their unique life arrangement.

As time progresses, the once-clear boundaries between their lives begin to blur. Jonathan discovers that John has become romantically involved with a woman named Elena, which complicates their delicate balance. Concerned about their shared wellbeing, Jonathan hires a private investigator to learn more about John's secret life. The situation escalates as Jonathan's attempts to control his brother's influence over their shared existence expose deeper conflicts and emotional struggles, fundamentally challenging their unconventional bond.