en Altadefinizione. Kai, a young man, misses the last train in a subway station at night and shortly afterwards meets his future daughter. She plans to kill him before he can conceive her, because he will meet her mother on the first train the following morning. A fatal realization forces them to spend the time together until the first train arrives: Kai and his possible future. Helen and her past life with her father. And a present that could change everything.