Markus goes home to his teenage daughter, Mathilde, when his wife dies in a train crash. All appears to be a tragic accident until a mathematics geek, who was also a fellow passenger on the ... Read allMarkus goes home to his teenage daughter, Mathilde, when his wife dies in a train crash. All appears to be a tragic accident until a mathematics geek, who was also a fellow passenger on the train, and his two colleagues show up.Markus goes home to his teenage daughter, Mathilde, when his wife dies in a train crash. All appears to be a tragic accident until a mathematics geek, who was also a fellow passenger on the train, and his two colleagues show up.