The fates of several Copenhagen residents collide when a WWII bombing mission accidentally targets a school full of children. Based on true events.

One day Marco discovers a dead man. After learning that Marco may have invaluable information, Commissioner Mørck is determined to find and rescue him.

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.