"Blood Valentine" comprises of 3 women, Chris, Rinrada (Chris' Daughter), and Korjai. They are working for Mr. Ralph, the head of a Killer Institution. One major rule of Blood Valentine is that they must not fall in love. However, Rinrada falls in love with Sun, a senior in her university. Chris decides to get rid of Sun and this creates a fracture in her relationship with daughter. As a result, they failed their mission and now they are the one to be eliminated.