Sad Obligation: a Sacrifice Spanning Twenty Years

A well-paid tutoring job is a life-saving straw for the depressed psychiatrist Shen Xin. However, the mysterious death of the student's father, Zhou Ting, caused a business card with his fingerprints and a remittance from an unknown source to drag him into the abyss of murder suspicion. The police evidence is conclusive and his plea is questionable. With the help of her friend Lin Zixiang, Shen Xin began to struggle to prove her innocence. But the deeper the investigation goes, the more horrifying the truth becomes: the wife who has endured domestic violence for a long time, and the silent and fearful son all seem to have hidden murderous intentions. This is more like a tacit conspiracy among everyone. When the clue finally pointed to the person he trusted most, Shen Xin was shocked to realize that he had already been in the center of a huge web woven by love and sin. An old incident twenty years ago, like the echo of fate, tightly entangled everyone's fate. Everyone is doing harm in the name of love. Everyone is a victim and an accomplice. This is not only an investigation to find the real murderer, but also a ruthless examination of the darker areas of human nature. When the price of redemption is destruction, how should they bear their sins and find an exit in the whirlpool of fate?