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 than ever before. One evening, John finds the body of a stranger in the backyard, carrying a letter to Sunny, leaving the family with more questions than ever. 1977. Sunny is pregnant and has just moved to Los Angeles from Korea with her husband. America is not turning out the way she had dreamed, and the loneliness is broken only by a fateful encounter at a bus stop. The unexpected connection spans decades and echoes into the present as they uncover devastating secrets that put their very lives at risk.