The 'Beast Cop' Ma Seok-do heads to a foreign country to extradite a suspect, but soon after his arrival, he discovers additional murder cases and hears about a vicious killer who has been committing crimes against tourists for several years.
So-hee enjoys her seemingly perfect life as a newlywed with her seemingly perfect husband. For being so perfect, she begins to suspect that her husband isn’t as he seems. Wanting some answers, she hires a private detective agency to trail him around.