During the Sneekweek there arrives a threatening letter at the headquarters. If certain requirements are not satisfied, there will be for the thousands visitors a deadly consequences. The team does everything to identify the sender of the letter and prevent an attack committed in Sneek.

Bram and Fenna travel to Vlieland when there's a body of a young man wash ashore. At first they suspected that the victim was beaten overboard. But then they discover that the boy had a reason to visit Vlieland. He was looking for something and he wasn't the only one.

During a burglary at a secondary school a locker is stolen, containing the national examinations that are about to begin. If the investigation team don't found the locker enough, there will be implications for thousands of high school students. Because of time pressure, tensions within the investigation team are high.

The brothers Carlo and Olivier were held responsible for numerous violent crimes in Friesland for years. Until one day they disappeared and nobody heard anything from them. It seems that the brothers are back, when there find a violent raid takes place in a restaurant. And they came back for a special reason.

In Leeuwarden there's a wooden box found with a amputated man's hand. Short after this there is found a second box with another part of a man's body. The detective team does everything what's possible to prevent even more boxes. But who is the perpetrator and what does he wants?

A boy and girl of seventeen are not returned from sailing at the IJsselmeer. The task for Fenna and Evert to immediate their family on the height. If the girl fished later that day she is still alive and well, meanwhile Fenna has discovered that there are strange things going on within her family.

In the Thialf Stadium is a charity hockey game between two teams but it is overshadowed by the murder of two boys from the youth selection. The offender is already arrested, but Fenna has serious doubts whether this man actually did it. Then there arrives someone from the past and again there lives at stakes.

A dangerous criminal knows to escape during a transfer to Leeuwarden. If it appears that this man played a role in the history of Fenna and he now may be on its coined. The pressure to find this man grows. Through all this, Fenna confronted with memories she rather forget.

Fenna is in bad shape. She sits at home and it seems no one to contact her. As one of the other detectives announce to leave, Carla sees her team slowly disintegrate. Then Leeuwarden startled by a winding-reaching consequences.