Snowdrop’s 11th episode ended with Lim Soo-ho (Jung Hae-in) and Yeong-ro (Jisoo) kissing each other, finally accepting their love amid the political turmoil and the hostage situation. However, things take a serious turn soon and the lovers don’t get much time to enjoy and cherish their time together. ANSP’s Gang-mu is now completely against his team as the political scheme is clearer than ever. He and Soo-ho begin to trust each other as well because they are left with no other option.
They plan to reveal everything to the students but they don’t know that there is someone betraying them from within the Hosu University dorm. There is another spy in their midst who secretly leaks their plan to the ANSP (Agency for National Security Planning), which now has no other option than to kill all the students.
However, the Director of the ANSP, Eun Chang-su wants to save his daughter…
