Han Mo-sae, a Korean immigrant in his sixties, struggles with dementia and its emotional side effects within the familiar walls of his old apartment. His wife, Young-Ja, navigates her partner's developinig Alzheimer's with the resilience that got her across the border in Korea and eventually to America. However, she has her own disease to battle as well--atrial fibrillation--which she keeps a secret from everyone except her white, handsome, somewhat generous neighbor. She also keeps her husband's Alzheimer's private, especially in their local Korean church. However, secrets can't be kept forever. Mo-sae's dementia eventually gets exposed in their church, and as his memory declines, so does his ability to care for their grandson, Johnathan, who often frequents their home. The stress of a lifetime of self-sacrifice and hardship is ultimately too much on Young-Ja's heart. She's sent to the hospital, but Mo-sae cannot make sense of her disappearance. In her absence, he watches vigilantly over their grandson, trying not to forget him, too.