Ten years ago, Lin Ruolan's supposedly peaceful high school life was shattered by an accident. She followed her parents' advice and was forced to study abroad. Many years later, she became a forensic doctor and entered the criminal investigation team of the city bureau. She met her childhood sweetheart, the criminal investigation captain Fu Yaochen, and his friend, psychology expert Han Ruming, who were both involved in the accident ten years ago.
In one case, they discovered that everything pointed to an organization called "Abyss", and under their continuous pursuit, they discovered the secret hidden in the accident ten years ago.
Intention: When we stare into the abyss, can we keep our boundaries?