The crafty and avaricious lawyer Liu Lang is hired to defend a food safety case for a big food corporation. He harbors hatred for the rookie, idealist, defense lawyer Lin Xiao-yan. One day, a five-year-old boy shows up claiming to be Liu Lang’s son. Liu Lang is incredulous.

The food safety case is spinning out of control as more evidence points out against the corporation. Liu Lang becomes the scapegoat, losing his job and having to compensate a large sum. Blackmailed all over the Internet and rejected by all the major law firms, Liu Lang is desperate and broke. He keeps looking for job opportunities and tries to contact all of his ex-girlfriends, hoping to find the mother of Liang-liang.