"Discover the secret behind this strange murder by searching the many detailed and varied backgrounds: visit the Octurni manor and its secret hideout, and escape from a high-security laboratory… Your double agent role will help you get to the truth: you’ll carry out the investigation as a cop, by collecting clues about the victim's death and questioning the suspects, and you'll finally unveil the mystery surrounding this murder thanks to your talents as a thief. Search over 35 unique locations to find the elements that will help you make progress in your investigation and the game. Solving the many available mini-games will also open up new paths of inquiry. Your determination will help you complete the numerous hidden object scenes."

Sophia is sent to investigate a suspicious death in a manor belonging to the powerful Octurni family. Cop by day, thief by night, Sofia, aka Black Viper is convinced that this is more than just a robbery gone wrong.