The former mercenary assassin Chen Tianlong has been asked to be the bodyguard and private doctor of Lin Wushuang, a pretty lady who is still a student. Their stories in the campus begin. “What's wrong, Tianlong?” “Your daughter is not sick, it's just that her Yin Qi is too heavy. The treatment for her is quite simple, find a man with abundant Yang Qi... and let him hold her while sleeping.” “This concerns Wushuang's life and death, and I definitely trust Tianlong, so let him try.”