An ordinary morning in a small town in Israel is shattered by unicorn mask-wearing assassins who kill four students and terrorize the local community.

Detective Davidi is convinced the four arrested Palestinians are innocent and that the murderers are among the students. Tom makes a "safe" list.

Davidi is partnered with Morag, a younger investigator. Davidi breaks the rules but discovers the Black Space app and receives a chilling message.

A video is posted on Black Space explaining the massacre and making more threats. Davidi arrests two boys but their complicated stories offer no clues.

Davidi and Morag find evidence at the burnt tree behind the high school and at one of the students' homes. Davidi's eye gets worse.

Omer stumbles on a video that had been deleted from Black Space. Tom becomes agitated when he finds out about the video. Miri is rushed to the hospital.

Davidi is taken off the investigation but Morag insists on consulting him. Everyone is freaked out about Tom. Omer turns to Davidi with information.

Davidi can't be in two places at once and abandons Miri in labor to rush to a party at the school, where he believes the killers will reveal all.

Davidi takes over the murder case, prompting Morag to pursue a lead of her own. Feeling exposed, Osher is forced to cover his tracks.

Now under house arrest, Neta tries to get a message out. Davidi has trouble keeping a balance between his personal life and the investigation.

In an attempt to get some answers, Morag takes Neta on an unauthorized trip. A confrontation among Osher's friends leads to a shocking confession.

The group of boys openly goes against Neta, pushing her father to a breaking point. Davidi and Morag refuse to drop the case.

The hit and run drives Davidi to extreme lengths to find out what Neta's letter said. When Zoey resurfaces, the killer announces their next target.