In the process of solving a series of bizarre murder cases in Binhai City, Su Yan and Lin Xiao, a pair of partners with complementary abilities and very different personalities, gradually discovered that there was a vague connection behind these cases, pointing to a mysterious figure codenamed "The Collector" and his huge plan that spanned many years. They need to use their respective majors (forensic evidence and criminal psychology) to peel off the cocoons in the daily routine of gags and thrilling case solving, and finally reveal the true face of the "Collector" and his twisted motives, and stop his ultimate "collection" plan.
