The lawyer helped the heroine's defense not to help her, but not to hope that the heroine would get a lighter sentence because she turned herself in. As a strict lawyer, it is impossible to fabricate detailed details without verifying the weather at the time. She deliberately created the fact that the heroine killed someone to make her sentence more severe.

The movie "Blowfish" focuses on a woman who managed to kill her husband with tetrodotoxin, which she thought would cover up the truth, but as the investigation deepens;

the police discover that the woman's husband looks like the rapist from six years ago, leading to a double-case investigation that ultimately reveals the truth and humanity.

The puffer fish is a poisonous creature, and the slightest improper treatment can lead to poisoning and death. The word pufferfish in the movie has a deeper meaning, namely, "love and hate cause poisoning of the heart and mind, which ultimately paralyzes a person and makes him or her lost."

The suspense of this movie is divided into two main parts. The first is the suspenseful conflict between the hero Liu Muyang and the rapist Xu Yicheng. Jiang Manzhi has been convinced that Liu Muyang and Xu Yicheng are two separate individuals, but DNA shows that the two are the same person with different names.