Teochew grandma Ye Shurou has always lived a peaceful, quiet life, enjoying her twilight years. Burdened by heavy debts, her grandson Xiaowei leaves for Thailand without telling the family, searching for his rumored billionaire grandfather, Zheng Musheng.
But Xiaowei ultimately returns with a shocking revelation that rocks the entire family: his grandfather passed away long ago, and the person who has been exchanging romantic letters with Grandma all these years was actually a complete stranger.
As Xiaowei digs deeper, a hidden, half-century-old love story suddenly came to light, striking deep into Grandma's heart.