A calm, rational pediatrician raises her son Yangyang alone. He was born with congenital heart disease. The truth behind her breakup five years ago was that she had discovered she carried a rare genetic disorder. Afraid she might pass it on to her children and unwilling to burden Ouyang Xuan, she drove him away with cruel words. For five years, she has worked hard while taking her son for treatment, yet deep down, she has never been able to let go of Ouyang Xuan…