Prince Alexander Blackwood, the Ninth Prince and a strong contender in the war of succession, is doomed to die before the age of thirty due to his Solar Essence Constitution. The only way to survive and claim the throne is to unite with a woman possessing the Lunar Essence Constitution. After ten years of searching in vain, he is cornered by assassins and stumbles upon Eleanor Winters, a bride on her wedding day. To his surprise, he discovers that she is the very woman he has been desperately seeking. He seizes the opportunity to take her for himself, determined to secure his life and ascend to the throne.