Embark on a suspenseful journey with a crime novelist seeking inspiration as she boards a train bound for Berlin. Her mundane voyage takes a thrilling turn when she finds herself sharing a compartment with a mysterious man who instantly captures her imagination. At first, their interaction is limited to fleeting glances, but as fate would have it, they're left alone to unravel the enigma that surrounds him. As they engage in a tantalizing exchange of words, the novelist attempts to decipher his profession solely from his outward appearance, but every guess falls short of the truth. The tension mounts until the man, with an unwavering expression, makes a chilling confession.