Kairos (2020)

S1E14 The Clues

Do Kyun is troubled by Taek Gyu's murder of Kim Jin Ho. Meanwhile, Seo Jin uncovers a lead that links Do Kyun to Taek Gyu. With assistance from Ae Ri, Seo Jin presses on with his inquiry and discovers Da Bin’s teddy bear, which has a location tracker hidden inside.