Single mother Tan Jing lives frugally to save for her son Sun Ping’s life-saving heart surgery, raising him with care and positivity. Nie Yusheng, a dedicated heart surgeon running a charity project for children with heart disease, selects Sun Ping as his first patient—only to discover that Tan Jing is the woman he loved seven years ago, reigniting past feelings amidst the urgency of saving her son.