It is Midsummer’s Eve in Sweden, and three teenagers in period dressed are celebrating in the woods when an assassin approaches and murders the trio.
A hysterical mother arrives at the police station. She’s received postcards explaining that her daughter plus two friends have gone to Europe on a whim. The trio was last seen heading off to the woods for a Midsummer’s Eve picnic.
One of Wallander’s colleagues is murdered at home, shot at close range. Details about the colleague’s personal life emerge, and Wallander wonders how well he really knew him. Wallander’s colleague was involved in the case of the missing teens, but it’s not clear how.
In the woods, the three bodies of the teens are now discovered. A fourth girl who was meant to attend the picnic may well be in peril. Moreover, the assassin seems far from done.
The killer seems to rely on knowledge secret to everyone except the victims, but how is this possible? Wallander races to uncover more about his dead colleague as well as the mysterious killer who always seems to be one step ahead. —pbs.org