Marenka and Renee - The Bank Robber Part 7 of 8

Marenka asks her friend Renee to take care of her apartment because she wants to travel. Renee agrees and comes to the apartment a short time later. When the doorbell rings, she thinks that Marenka has forgotten something and just opens the door. But a stranger comes in and overwhelms her. Renee is quickly tied up and gagged. What does the stranger want and will Marenka come to the rescue?