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When lives slip away from us inadvertently, a newly appointed female team leader of "SPO" unites with other partners to clear the air for them; what is the outcome of the "Spoken Case" with many cases and the mysterious whereabouts of "Ritian"; why did the former leader of the action team leave his job without reason and became a murderer? Everything is pulled in the dark, and among many fetters and suspicions, the contest between justice and evil begins...