Is going after criminals easier than falling in love? Ji Bai (Wang Kai) is an ace police detective. With newbie criminal profiler Xu Xu (Wang Zi Wen) as his partner, they appear to be an odd couple to others around them. But their partnership is highly successful, with an unbeatable track record for solving crime. When Ji Bai starts to fall in love with Xu Xu through their close working relationship, Xu Xu is slow to return his feelings. But does their relationship stand a chance when the dangerous “Angel’s Killer” resurfaces? “When a Snail Falls in Love” is a 2016 Chinese drama series directed by Zhang Kai Zhou. It is based on the novel “Ru Guo Wo Niu You Ai Qing” by Ding Mo.