Kairos (2020)

S1E3 Call from the Future

Upon returning to the hospital, Ae Ri discovers that her mother has vanished. At the same time, Seo Jin comes to the unsettling realization that he is a month ahead of Ae Ri in time. Desperate to protect his wife and daughter, he reaches out to Ae Ri to reveal the reality of their situation, but she remains skeptical and refuses to accept his claims.