Zach visits his grandparents every summer at their cottage by the lake. He is looking forward to fishing with Gramps and eating Gram’s cooking. Gramps calls their first idyllic day a “Memory Box Day.” Zach learns that this is a day for young and old to start gathering photos, stories, and souvenirs to store in a special box to remember their times together. As Zach’s time with his grandparents unfolds, he learns the true reason for the memory box; it is especially for Gramps who has been diagnosed with Alzheimer’s. During the rest of his stay, Zach and his grandparents fill the box with wonderful memories of summers past and new memories, building something that will always keep them together.