Dia, the princess of Friege Empire, was killed by the sharp icicles of her own father, the emperor, on her 17th birthday. The emperor embraced his daughter's corpse and destroyed the world. Anna, an overworked office worker, was reading a novel with a tragic ending before going to bed. The next morning, she wakes up to realize that she has become Princess Dia in the novel! As expected, Her father is the ruthless Ice Emperor, feared for his inhumanity. As told in the original novel, the Ice Emperor mercilessly shows murderous intent to his infant daughter. Día (Anna) thinks to herself, "At this rate, he will kill me on my 17th birthday...or even earlier." To change her tragic fate, Dia (Anna) takes actions that the original princess would never take in the original novel. "Why did the Ice Emperor destroy the world in tears after killing his own daughter...?" A different story from the original novel begins to unfold when the novel's mystery is solved. Will Día (Anna) be able to escape her deadly fate before turning 17?