"CHECKMATE" The Beginning of Sherlock Holmes

London, 1877
A still little-known detective and his partner find themselves charged to inquire about the mysterious missing of Grace Anderson.
Sherlock Holmes and the evildoer are then playing a real chess game as they both know how to handle the investigation's pawns in order to put the adversary to flight.
What happened to Mrs. Anderson?
Who wanted to harm her?
Only Sherlock Holmes and Dr. Watson can solve these riddles.