The happy life of the couple Jiang Lan and Lin Fangxi, who are both doctors, was disrupted by an explosive event - Lin Lin, the son of Lin Fangxi and his first love Bai Xiaou born ten years ago, inevitably had to enter the Lin family. It turned out that Lin Fangxi broke up with Bai Xiaou due to a misunderstanding back then, without knowing she was pregnant. After giving birth to Lin Lin, Bai Xiaou raised him alone and never married. Before she passed away, she hoped that Lin Lin could be by his father's side. Thus, the drama unfolds, showcasing the various conflicts, confusions, and tests faced by this happy family as they deal with unexpected ethical challenges, as well as their ultimate commitment to beautiful emotions. Meanwhile, a mysterious woman named Bai Ling, claiming to come from overseas, enters the hospital where Lin Fangxi works. As Lin Fangxi's close colleague, she secretly monitors everything about the Lin family. She shows great concern and helps in Lin Lin's life, becoming a trustworthy confidante for Lin Fangxi to pour out his troubles. While striving to gain the Lin family's favor, she continuously sets traps for them. Her baffling behaviors leave the audience full of doubts...