<Chinese TV SeriesNOW> ”Bing Yu Huo ~Being a Hero~” EP1, Chen Yu returns to the drug control battalion after three years = Synopsis and spoilers

*This article contains spoilers and synopsis.
In Episode 1 of "HERO~," Chen Yu returns to the drug enforcement battalion after three years.
In the middle of the night during a thunderstorm, a man was running away from someone on a mountain path when he slipped and fell down a slope into a river. The body was found with multiple stab wounds in Yunhe, where drug crimes are rampant.
Chen Yu (Wang Yibo), who works at the office, was notified and went to the scene. While Chen Yu was investigating the scene, he found a piece of green jade and decided to take it home for analysis.
Later, Chen Yu is summoned by Lin Dezhan (Wang Jinsong), the head of the Yunhe Public Security Bureau, and ordered to return to the anti-drug battalion. Three years ago, Chen Yu was working in the anti-drug battalion.
Chen Yu had been demoted to police duty for making a mistake and injuring his superior. Chen Yu returns to the drug control battalion for the first time in three years and is welcomed by Lan Anran (Zhao Zhaoyi).
Chen Liwen, deputy head of the anti-drug battalion, spoke at the meeting about the need to investigate the source and sales route of drugs. Chen Yu said he had committed suicide three years ago and that he had the tattoo of the body found at the scene of the crime.
He said that the tattoos of the drug cartel members he was pursuing matched, so the two cases needed to be investigated at the same time. Chen Yu received an anonymous tip about drug trafficking, and Yun Hui
On his way to the pharmacy, Chen Yu suddenly remembered that there was a medicine bag from Yunhui Pharmacy on Lin Dezan's desk, which made him more suspicious of Lin Dezan.