Kindergarten teacher Hannah lovingly creates a calendar of activities for the coming year to get her relationship with her boyfriend Simon back on track. Through a mishap, however, the calendar falls into the hands of misanthropic Jonathan, a wealthy publishing heir who sets out to find the author with growing curiosity. Miraculously, the paths of the two cross from then on, for the time being without knowing of their connection through the calendar.

In a hospital in Hamburg, an unidentified woman is disconnected from the life-support system. While the investigators search for the mysterious perpetrator, two more men are murdered.