The Teach

Paweł comes back to his seaside town and assumes a teaching position at the high school; Bogdan and Paweł's sailing trip ends in confusion and terror as a student named Kacper Krynicki vanishes into thin air and a dead body is found on the beach.

The investigation reveals the deceased to be Iwan Myłko, an employee of Kacper's father, Waldemar Krynicki; Paweł feels Bogdan is hiding something; the lead investigator suspects Iwan and Kacper knew each other.

A video claiming Kacper committed suicide surfaces online; the local newspaper comes out with a story accusing Bogdan of being violent towards the high school students on his sailing trips; Paweł makes a shocking discovery.

Paweł finds a suspicious video linked to Waldemar; the forensic pathologist in charge of Bogdan's autopsy suspects his death to be a homicide, but his boss orders him to falsify the report; Kacper appears to be lurking at Bogdan's funeral.

Paweł has suspicions that Kacper may be Bogdan's son; investigators looking into the deaths find traces of blood at a warehouse.

In an effort to uncover Bogdan's connection to the mystery, Paweł is led to a resort, where he finds Kacper, who makes a stunning confession.