Once upon a time, the secret apartment of the underground was housed in the museum. It was the center of the Proskuriv partisan movement - an active underground organization in Ukraine during the Second World War. The initiators of the creation of the museum were veterans - members of the organization. The museum contains personal belongings of members of the underground, documents, archival materials, photos and videos. Today, the exposition contains many old photographs of members of the underground, a chair with a radio transmitter, helmets with bullet holes and much more. The updated funds of the museum allow you to study in detail the history of the city and its defenders who fought for the independence of Proskuriv. It is also the only museum in Khmelnytskyi dedicated to World War II.