The police find out about the crime the way everyone does: on Snapchat. The video shows the terrified victim begging for forgiveness. When her body is found, it is marked with a number 2 ... Detective Huldar joins the investigation, bringing child psychologist Freyja on board to help question the murdered teenager's friends. Soon, they uncover that Stella was far from the angel people claim-- but even so, who could have hated her enough to kill? Then another teenager goes missing, and more clips are sent. Freyja and Huldar can agree on two things at least: the truth is far from simple. And the killer is not done yet.