Cyber Security & Technology Crime Bureau Senior Inspector Szeto Chung is a mentor to and also a friend of Inspector Siu Mei-ting. They have unraveled all kinds of phone, online and tech scams. While Szeto Chung is investigating an online dating case, he runs into his ex-girlfriend Cheung Wai again.

With his two friends, a video-game-obsessed young man finds himself in a strange version of Tokyo where they must compete in dangerous games to win.