For years, Grandma Shurou from Chaoshan lived on the letters and remittances from her husband who left for Nanyang to survive the war and never returned. When her debt-ridden grandson Xiaowei secretly travels to Thailand to find his rumoured “millionaire” grandpa, he returns with shocking news: his grandpa is long gone, and the person Grandma had exchanged letters with for years was a stranger. As Xiaowei digs deeper, a long-buried misunderstanding spanning three generations begins to unravel, revealing a truth that binds two families across time and borders.