Hye In interrogates Sa Rang about whether he is actually Black Dog. Ultimately, Sa Rang confesses the truth regarding Oh Si Eun’s cellphone. After hearing Sa Rang’s account, Hye In is convinced that the person who took Si Eun’s phone is the one who pushed Si Eun. Meanwhile, rumours begin to spread about Baek Je Na’s drug abuse.
惠仁將思朗約出來打算問時恩手機的事，沒想到手機卻被人搶走，眾人懷疑搶手機的就是殺害時恩的兇手…
