The year is 1975. Bangkok. Dutch diplomat Herman Knippenberg arrives to unravel a mystery: the vanishing of a young couple, their last known moments spent at the apartment of gem dealer Charles Sobhraj.

Abandoning her former existence for the sake of love, Marie-Andrée Leclerc finds herself confronted with a horrifying price. Meanwhile, Herman makes a solemn commitment to unravel the mystery surrounding the murders of the Dutch couple.

Dominique Renelleau, a young Frenchman, desperately seeks to flee the terrifying confines of Charles Sobhraj’s hideout. While listening to the accounts of Nadine and Remi, Herman begins to grasp the true extent of Charles's atrocities.

In Nepal, Charles unleashes a devastating path of destruction, his actions a chilling escalation. Meanwhile, Nadine works with Herman, assisting him in assembling the crucial evidence required to compel the authorities to intervene.

A relentless contest of intellect unfolded between Herman and Charles. Herman persistently pressed the Thai police for the prosecution of the suspects, each inquiry a fresh burden. Meanwhile, Charles meticulously refined his strategy for es…

The repercussions of Gautier's flight loom over Herman's prospects in diplomacy. Meanwhile, Charles seeks to establish a business venture in France, a land steeped in personal significance.

Charles and Marie-Andrée arrived in Paris with the intention of building a new life. Simultaneously, Herman took a perilous risk within his investigation, a gamble that ultimately yielded a crucial discovery.

In India, a tightening circle of scrutiny forms around Charles and Marie-Andrée, yet the conclusion of Herman's quest for Sobhraj remains a distant prospect.