Lena's daughter Ada is missing, along with a group of preschoolers. Rafal is leading the police operation. Marta Czarnecka, the president of the local SPA, joins the search. Lena is looking for her daughter. The clues lead underground.
Lena checks the leads on her own. She checks what Ada was interested in. She comes across the trail of the boys who are searching the underground. Czarnecka orders the tunnel next to the underground laboratory in her SPA to be blown up.
