The mentally handicapped Stöffi lives with his mother as a lovable city original in Einsiedeln. When his mother dies unexpectedly, Stöffi threatens to be put in a home. In order to protect her son from this, the mother reveals a long-kept secret on her deathbed. Zeno - her childhood sweetheart and owner of the «Schwanen» restaurant - is Stöffi's father. He should now take care of him. A long journey begins for Stöffi and Zeno, because they have to learn to be a father and a son first.