At the end of the 19th century, a monster is prowling around in the Victorian fog of London. He has trampled on a young girl, killed a Member of Parliament, and molested a match seller. When he finds out the terrible news, Mr Utterson ends up discovering that the case is not unrelated to his friend Dr Henry Jekyll and to the terrible individual currently staying with him: Mr Hyde. Step into Mr Utterson's shoes and set off on the trail of Mr Hyde. Finally discover the ghastly link that connects Dr Jekyll with this Mr Hyde! Can it be broken? Up to you to play! Move around in Dr Jekyll's house, his laboratory, and the labyrinth city of London to get to the bottom of this mystery and to try to save Dr Jekyll from the danger stalking him.