The Seventh Knife

The mentally retarded Qi Xue was sentenced to death for killing the wealthy Zhao Dachuan. Her childhood friend and new prosecutor Gu Haiyan found her name in the file. With only seven days left before the execution, Gu Haiyan desperately pursued the truth, but found that the case was shrouded in mystery - Qi Xue had no contact with the deceased, the motive for the murder was a mystery, and there were still traces of violation on her body. When the countdown reaches zero, an accident causes Qi Xue to suspend execution, and the deeper darkness has just emerged. Can the two girls standing inside and outside the high wall fulfill the promise they made when they were young to go see the sea together?