It was the night of the annual festival. When Yilan opens her eyes, she finds the emperor, notorious for his cruelty, sleeping next to her. She runs away immediately, but... "I'm pregnant." She unexpectedly conceives a tyrant's baby in a single night. Yilan decides to hide this fact after hearing that the emperor detests women who approach him. Yet Cairan keeps testing her resolve. Will Yilan ever get away from Cairan?