A father’s love knows no bounds. André Bamberski, a French citizen, would have moved heaven and earth for his daughter Kalinka Bamberski - a fact that became clear after her untimely and mysterious death. The teenage girl had been staying with her mother, Danièle Gonnin, and her stepfather, Dieter Krombach, when she suddenly died on July 9, 1982. An autopsy couldn't determine the cause, but Bamberski was certain it was the work of Krombach. He set off on a relentless quest for the truth, one that lasted 30 years, cost him his job, and alienated his family and friends.

How far would Bamberski go for justice? What would this grief-stricken father do to the man who took his wife and presumably raped and killed his 14-year-old daughter? His unbelievable true story raises questions about vigilante justice and paints a grim and heartbreaking portrait of a man's thirst for vengeance.