In ancient times, castles were built not only for nobles and aristocrats to live there, but also to contain criminals there, most often high-ranking ones, who were accused of high treason or someone close to the king lost his disposition and trust. The story of Secrets of Prison Castle tells how two knights Jonathan and Melissa went to one of these prison castles, but already abandoned, in search of stolen valuable items. The former prisoner was a confidant of the king, but once he stole several valuable artifacts from the monarch and tried to escape. He was caught and put in prison, but the stolen was never found. The thief sat under lock and key for several years and died, and the prison was closed. But the king still wants his things back and sent our heroes in search of. Perhaps the prisoner could have hidden them in the prison, there are many hiding places. Help the heroes in Secrets of Prison Castle organize a quest.