It's Succession meets Knives Out—only this Hollywood-like plot is real.

Nicolas Puech, 80, the estranged Hermès heir, announced a bold plan to adopt his 51-year-old former gardener and handyman to bequeath him his $11 billion fortune. Puech is the grandson of the founder of the fashion giant and owns 5.7% of the company.

According to the Swiss publication Tribune de Genève, the reclusive Peuch has little contact with his family. Single and childless, he........

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