Line Walker: The Prelude
First air date: 2017-09-18

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In 2010, Cheuk Hoi secretly travels to Bangkok to conduct a drug operation with his undercover agents in Thailand. As they finish their mission and are about to leave Thailand, an explosion causes all of Cheuk Hoi's undercover agents to die in a sea of fire. At the same time, Cheuk Hoi's good friend, CIB Inspector Lai Sir, is killed for unknown reasons, leaving Cheuk Hoi in charge of a female cop who is not yet officially an undercover. Cheuk Hoi knows that Lai Sir still has undercover agents whose identities have been deleted. To learn the truth about Lai Sir's death, Cheuk Hoi must find all of the undercovers. He and Suk Mui begin to search for the undercover agents.


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Michael Miu Kiu-Wai

as 卓凯

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Jessica Hester Hsuan

as 施嘉莉

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Moses Chan Ho

as 魏德信

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Pakho Chau

as 乐少锋

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Priscilla Wong

as 郑淑梅

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Benz Hui Shiu-Hung

as 覃欢喜

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Eddie Cheung Siu-Fai

as 黎瑞权

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Jimmy Au Shui-Wai

as 康道行

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Vincent Lam Wai

as 猜Fing

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