Erik then follows to arrange Guus and the resistance leaders' departure by sea. However, Robby has infiltrated the group and so the Germans have followed them. Erik sees Robby with them and tries unsuccessfully to warn them. After ducking into the beach mansion party for cover, seeing Alex and dancing ballroom tango with him, Erik meets the others on the beach. When Robby realises Erik knows about his collaboration, he fires a signal flare. Despite German warnings, the group tries to flee but the leaders are killed. Guus escapes by swimming, but only Erik reaches the ship.