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.
Du Chun
Cao Zheng
Li Xiaoran
He Jun
Wang Tianchen
Gu Ming Zhe
Ma Rui
Wen Jing Ya's Mother
Cheng Fangxu
Lu Xiao Bei
Zhao Qianzi
Ma Xiao Jing's Mother
Chen Ya'an
Wen Jing Ya
