The Remedy(2019)

In year 2006, female university student Yin Lu met with a mishap. Due to lack of clues, the case is left unsolved. Lian Zhou who is Yin Lu's boyfriend, went to Gu Cheng the last place Yin Lu might be at, to find out the truth despite everyone's objections. He tried to investigate thoroughly taking the cover of a gas tank delivery man.