A German physician (played by lex Brendem ü hl) meets Eva (Natalia Aurelio Natalia Oreiro), Enzo (Diego Peretti Diego Peretti) and their three children on his way to Bariloche in Patagonia, Argentina, in 1960, as they prepare to open an inn on the shores of Lake Nahuel Huapi. This model family, especially the 12-year-old girl Lilith (Florencia Bado) who looks younger than her age, rekindles his pursuit of purity and perfection. A family of five, who did not know his true identity, regarded him as the first guest. They were gradually attracted by the man's personality, aristocratic demeanor, profound knowledge and rich financial resources. Until they realized that the man around them was one of the biggest criminals of all time. Based on real events.