Blake & Mortimer 1 - The Yellow M

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The story revolves around the enigmatic figure known as the 'Yellow Mark,' whose audacious crimes, including a heist at the Bank of England and the theft of the imperial crown, baffle authorities. With a penchant for taunting the police by announcing his intentions, the criminal's increasing boldness raises alarms at the highest levels of government. Tasked with uncovering his identity, Captain Francis Blake enlists the help of his friend, Professor Philip Mortimer, whose scientific expertise is crucial in unraveling this perplexing mystery.