Closure is a 2026 Polish documentary film directed and produced by Michaà  Marczak, with producers Monika Braid, Remi Grellety, Katarzyna Szczerba, and Karolina Marczak. The film had its world premiere in the World Cinema Documentary Competition at the 2026 Sundance Film Festival.
After his teenage son goes missing, Daniel searches Poland's Vistula River, torn between fear that his son is dead and hope that he may still be alive.
Closure premiered in the World Cinema Documentary Competition at the 2026 Sundance Film Festival.
Marczak began filming after encountering Daniel while location scouting by the Vistula River for a planned fiction feature film and joining the search for Daniel's missing son. The project was selected for the Thessaloniki Pitching Forum at the Thessaloniki Documentary Festival's Agora industry program in 2025.