Daniel did not hear his sixteen-year-old son, Krzysztof, leave the house in the early hours of the morning. He did not know what had drawn the boy to the bridge over the Vistula—only that he had last been seen there. CCTV cameras captured his image, but then, in the span between camera rotations, Krzysiek vanished. There were two possibilities: either he had jumped into the river or he had slipped away from the bridge unnoticed. Since then, Daniel and his wife, Agnieszka, have lived in limbo, suspended between desperate hope and paralyzing fear. Unable to passively await a breakthrough in the police investigation—a prospect that grows increasingly unlikely—Daniel builds a boat equipped with cameras and drones, intending to explore the river’s dark depths himself. This marks the beginning of a search that will consume his entire life. Day after day, he combs the Vistula, constantly developing new tools and search techniques. Other families, trapped in the same abyss of uncertainty and endlessly seeking answers, begin to reach out to him. The long, solitary hours spent on the boat offer Daniel a chance to come to terms with the life he led before Krzysztof’s disappearance. As the months pass, his pain only deepens; he grapples with the constant tension between an unrelenting drive to continue the search and the agonizing reality that an irreversible loss has changed his life forever.