There are many problems in the Zhang family, but one eventful summer changes many things. Zhang Junxiong is diagnosed with Alzheimer's, and his condition weighs heavily on his wife Wang Feng and the rest of the family. Feng has mixed feelings about Jun-Xiong’s memory loss, in hope that he might forget his lover in the army. Meanwhile, their daughter, Xiao Meng is released on parole from a long prison term and struggles to reconnect with her illegitimate son, Ah Chuan, and her loose-cannon ex-boyfriend, Ah Wen. When Cheng-An who served in the army with Jun-Xiong visits the family, it makes Feng suspicious if Jun-Xiong really forgets about the past romance. Feng doesn’t want this past secret discovered by his daughter and grandson, but she also cannot relieve the pain from this forbidden secret.