"Maria am Wasser" tells a story of the search in symbolic allusions and beautiful, fairytale pictures. The search for love, past, reconciliation and forgiveness. Summer 1983 in Saxony. A tank drives with four children of the orphanage "Frohe Zukunft" through the Elbe. The excursion seems to end fatally for all children, as the tank sinks. 22 years later, organ builder Marcus Lenk returns to his home village of Neusorge and claims to be one of the children. Marcus is perplexed: no one recognizes him. Not even his father Hannes, who lives with a few sheep, nor his mother Mary, who runs the orphanage with a strict hand, believe in his identity.