Additional Study Information: We are doing this study to find out if tisotumab vedotin treats ovarian cancer. We want to see if patients with your kind of ovarian cancer respond to the drug. We want to see how long it takes patients to respond to tisotumab vedotin and how long the response lasts. We also want to learn more about any side effects patients have when they get tisotumab vedotin. Tisotumab vedotin is a type of drug called an antibody drug conjugate or ADC. ADCs usually have 2 parts. Antibody: Antibodies are part of your immune system. Usually, they help protect you from getting sick. In tisotumab vedotin, we are using an antibody that is designed to find and stick to the ovarian cancer cells in your body. Drug: the part of the ADC that kills cells. The cell-killing part of tisotumab vedotin is a drug called MMAE. In tisotumab vedotin, the antibody part is designed to stick to cancer cells so that the drug part can kill them. It may also stick to some non-cancer cells in your body.