When Ling Jinyu was eighteen years old, her parents died in a car accident.
At the funeral, her sister Ling Ye, who had been away from home for five years, returned.
But Ling Ye is no longer her biological sister - the adoption relationship many years ago was terminated the day Ling Ye left.
The last contact between them was Ling Ye's words before leaving:
"I'll take care of you until you graduate from college."
But Ling Jinyu didn't want care, she wanted Ling Ye.
As a sister, as a lover, in any name that can stay by her side.
Ling Ye said: "Don't like me."
Ling Jinyu said: "It's too late."
"I have a disease, falling in love with you, which is incurable."
Love is like ALS, once it starts, you can't stop.
Concept: Love is like ALS, there is no solution. Once you fall in love, it cannot be unfrozen.