Moo Goong Hwa is a former boxer. After the death of her husband, she has raised her daughter alone. She now works as a police officer. Meanwhile, Cha Tae Jin is an elite police officer who graduated from the police university. He is full of justice.

Xu Duo Cheng is a young girl full of joy and life. No one knows that there's a shadow behind her smile: she actually suffers from the ALS disease, which means she won't have long to live and will eventually slowly but surely end up paralyzed. Due to that, Duo Cheng does her best to enjoy the rest of her days to the fullest.

But things becomes difficult when she meets the handsome, young musician Jiang Nan who falls for her.

Will she give in to her heart or will she walk away from him to protect him from the pain?