The infamous Mister X is on the run again.
Welcome to London! The best detectives are back in the English capital! As always they are chasing Mister x, but this time... no one knows who he is... In this version cards of the famous board game, detectives will have to unmask and then capture Mister x, but be careful. . . The Mister x card can change hands. Mister x, he uses his powerful black tickets to put pressure on detectives or disappear when the situation becomes too critical. Will you catch it before it's too late?