What happens when Alyona and Sophia get a ride with a man to their apartment in the novel, Disappearing Earth?

The man that Alyona and Sophia help walk to his car tells them that he will give them a ride home. Alyona considers whether to take the bus and then she decides that it is safe to get a ride. The man drives past their apartment and says that he is taking them to his place first. When Alyssa slips her phone out to use it, he takes it away. They drive past the turnoff for the city airport and keep going. As they drive further, Alyona tries to decide what to do.