Ten years after his sister vanished, Luca receives a mysterious letter: she’s alive but will die in 21 days unless he obeys a deadly demand. With time running out, Lucas must decide how far he will go to save her.

When an elite class reunion on a luxury high‑tech train is sabotaged, an anonymous “I killed” confession traps the former students in a 100‑hour pressure cooker of secrets. As the past resurfaces, Lara and Aarón must uncover the truth behind a decade‑old death before the engineered journey destroys them all.

This investigation reveals a miscarriage of justice, the story of a woman wrongly convicted of the murder of her husband. The book proves her innocence and reveals who committed the murder.

In the streets of annemasse, Emma Delorme investigates a kidnapping that echoes her own past.