The Butterfly Sign is a first person detective story putting players in shoes of the lone survivor and the only witness to a disastrous incident. The protagonist’s destiny depends on his memories. That is why he dares to take a desperate measure. He takes an experimental drug "Rammex" which immerses him in the depths of his mind and precisely restores all the events occurred to him. In his memories, the protagonist will discover the ones responsible for the disaster, collecting clues bit by bit…Explore Memority hospital and its premises, learn its secrets and restore the chain of events that took place here. Solve the puzzles and murders committed at Memority. Find clues, compare the facts and avoid tricky obstacles in your way. Penetrate into the new, previously inaccessible memories. Make conclusions