Propelled to the head of the W Group after the death of his adoptive father, Largo Winch decides, to everyone's surprise, to sell it, and use the proceeds to create an ambitious humanitarian foundation. But on the very same day, he finds himself accused of crimes against humanity by a mysterious witness. To prove his innocence, Largo will have to retrace the steps of his past life, in the heart of the Burmese jungle.

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