Some people are like a drug, once you get a taste of it, you are forever addicted.
A love story between two young men, from foes to a bickering couple, withstanding 8 years of separation, suffering and surviving hardships together. They are Gu Hai & Bai Luo Yin, in Chinese, when Hai & Luoyin are put together (Hailuoyin = 海洛因) means heroin, a substance that can be very addictive.
There's a type of person who is like a Heroin. Once you got involved, you can never let it go….