The story begins with an orphan, Kevin, who was born in a small city in inland China. He was abandoned by his parents in the hospital due to congenital heart disease. Later, with the help of an orphanage, he was fortunate enough to be taken abroad by a foreign couple and successfully completed surgical treatment. But this poor child was separated from this warm family in an accident. During the next six years, he experienced various life experiences and met a family named Chen by chance. The Chen Chengen family not only adopted him, but also provided him with superior living conditions and learning environment. In addition, in this mysterious family, it didn't take long for Kevin to meet several strange friends, including Linda, Liang Jiahe, Sun Jiani, Tu Wen, and Zhou Yicen. After five months of getting along, they not only became classmates who love and help each other, but also became each other's best friends; during this period, Kevin also received a piece of exciting real news, that is, his classmates were all real aliens; not only that, these alien friends also have an arduous historical mission, which is to repair the door to time and space.
Concept: Memory deep in the soul
