In the wake of Sherlock Holmes’s apparent death, a grief-stricken Dr. Watson is drawn into a financial enigma when a wealthy entrepreneur seeks an extraordinary loan with no repayment plan. As Watson delves deeper, he uncovers a sophisticated scheme of tax avoidance that threatens the nation’s coffers and entangles him in a speculative disaster. With his own finances in ruins, only Mycroft Holmes can untangle the web of high finance, political influence, and legal loopholes—proving that the greatest mysteries are not always solved with a magnifying glass, but with a ledger.