On a blue voyage with her family, 16-year-old Sara suddenly notices the presence of a stranger on the deck of the boat. No one can explain how he got there. The stranger never utters a word; he unsettles everyone with nothing but his silence. His mere presence casts an invisible weight over the boat. Those who approach him project their own desires, fears, and deficiencies onto him, shaping his meaning according to their needs. To some, he appears as a confidant, to others a threat, and to a few, a symbol of salvation. Serving as a mirror for everyone on board, the stranger forms a genuine bond only with Sara. As the hours pass, the atmosphere grows heavier, the tension thicker. By the end of the voyage, the stranger will either be saved - or cast away.