Revolves around three women who were strangers to each other but were caught in a whirlpool of a sudden ship explosion and became suspects in the case. Du Lin is a newly recruited detective in the police station. Although he was born as a nobody in troubled times, he is passionate about investigating cases. He may make mistakes in small matters, but he is firm and reliable in big matters. Facing pressure and challenges from the outside world, he has also experienced a series of growth and transformation.