In a poverty-stricken neighbourhood of Istanbul, a serial killer appears to be targeting rubbish collectors. With Ikmen on leave looking after his new baby, Ayse leads the investigation instead, and Suleyman finally entrusts her with the secret she's suspected for so long.

When Ayse and Suleyman are sent to investigate a house fire, all seems innocuous at first, but they soon turn up a clue that may break new ground in Suleyman's search for Kayra Khan.

They're even more surprised when the person who blocks them investigating it is the new chief inspector - Ikmen.