After ending her dilapidated marriage, the beautiful and wistful woman Mary Ji (Rachelle Lefevre) moves into an old apartment with a history of more than half a century. Not long after she checked in, she received a call from a stranger. The other party is a woman named Rose (Lorna Raver) who is looking for her man. Mary didn't care at first, but she was disturbed by Rose's repeated calls, and she discovered by accident that it might have been a time-traveled phone call. At the other end of the phone line, Rose is an unfortunate woman who lived in the late 1970s. The two women had a brief and in-depth communication, but a joke from Mary caused Rose to kill her husband. After that, the almost deranged Rose set her sights on Mary, who almost collapsed, and the harassment of her ex-husband Steven (Ed Quinn) made her even more miserable. Everything is moving in an unpredictable direction.