Finally home after his astounding journey, Mortimer resumes his simple life and peruses the daily newspaper. One by one, famous artifacts from museums and private collections around the world are missing. The person claiming responsibility for the thefts goes by the moniker - the Crimson Thief, a ghost that the police can do nothing about. Mortimer however, jumps on the case and is determined to find the stolen goods while bringing the thief to justice.