The resources of distant Mercury are exhausted. Young Shen Hao, shouldering the mission of his tribe, crosses the sea of stars alone to reach Earth to find a new habitat. He has a cold and taciturn personality, possesses the power of controlling water, and has no understanding of human emotions and life. He was accidentally rescued by the kind-hearted Xia Zhi when he was living on the street.
Seeing that he was helpless, Xia Zhi kindly took him in and taught him how to eat, go to school, and feel the warmth of the world. As they get along day after day, the unkind interstellar boy slowly falls in love with Xia Zhi and gives all the rare treasures unique to the planet to Xia Zhi. With only her in his heart and eyes, the two quietly begin to fall in love across the galaxy.
The peaceful life was shattered in an instant, Mercury's pursuers followed the signal, and the home planet issued a forced recall order. If Shen Hao insists on staying on Earth, the Mercury army will attack and harm the entire Earth, and Xia Zhi will also be in danger. With a girl in love on one side and the survival of hundreds of millions of Mercury tribesmen on the other, Shen Hao has no choice.
In order to protect Xia Zhi's safety, he could only suppress his reluctance and return to Mercury without saying goodbye. The galaxy is vast, and the two planets face each other from a distance, with no possibility of meeting each other. A brief encounter is exchanged for a long time of missing each other. No matter how deep the love is, it cannot withstand the fate of being separated by the stars.
Concept: modern science fiction