2016’s Line Walker was a loose spin-off from the highly-successful TVB series of the same title, with the characters of Charmaine Sheh and Hui Shiu Hung the only ties between small and big screen; this Line Walker 2: Invisible Spy is a thematic sequel, with all narrative connections to the TV show now severed, as Sheh and Hui don’t return. Louis Koo, Nick Cheung and Francis Ng do return however, in new roles. When a hacker (Jiang Peiyao), arrested for her connection to a terrorist car crash in the center of Hong Kong, reveals that there may be a network of undercover terrorists in the Hong Kong police, everyone becomes a potential suspect, including the three officers in charge of retrieving a hard-drive containing a list of the moles from a location in Burma: Ching (Nick Cheung), Cheng (Louis Koo) and Yip (Francis Ng). Ching and Cheng are both former students of Yip, but they may share a far older bond, while their allegiances soon prove mysterious.

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