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Through a mysterious Motorola phone, two detectives - one from the present, and the other from 15 years in the past - begin communicating and working together to solve cold cases. This is the Chinese adaptation of 2016 tvN drama Signal.

Casts

Du Chun

Li Xiaoran

Wang Tianchen

Ma Rui

Cheng Fang Xu

Zhao Qianzi

Chen Ya'an