In 1908, Adaline (Blake Lively) was born. In a blink of an eye, 27 years have passed. The crying baby has grown up, formed her own family, and become a mother. However, at the happiest moment in her life, an accident made Adaline hover on the edge of life and death and finally escaped from death. However, soon, Adaline found that some wonderful changes had taken place in her body. She stopped getting old, but stayed at the age of 27 forever. Having eternal life sounds wonderful, but in fact it is full of pain. As time goes by, the people Adaline loves gradually get older and eventually leave her, leaving Adaline alone in this world, immersed in endless loneliness. Adaline closed her heart and no longer interacted with the outside world. Nearly eighty years have passed. At this time, a man named Eli (Michiel Huisman) walked into Adaline's life.