1999: The Kim family is struggling to move on after their mother, Sunny, vanished a year ago. Sixty-one-year-old John Kim feels more isolated from his grown children, Anastasia and Ronald, than ever before. But one evening, their fragile lives are further upended when John finds the body of a stranger in the backyard, carrying a letter to Sunny, leaving the family with more questions than ever about the stranger’s history and possible connections to their mother. 1977: Sunny is pregnant and has just moved to Los Angeles from Korea with her aloof and often-absent husband. America is not turning out the way she had dreamed it to be, and the loneliness and isolation are broken only by a fateful encounter at a bus stop. The unexpected connection spans the decades and echoes into the family’s lives in the present as they uncover devastating secrets that put not only everything they thought they knew about their mother but their very lives at risk.