After an event leaves her traumatized, nineteen-year-old Lethe finds herself suddenly trapped in the future, trapped in the body of her older self. In addition to having to adjust to her new surroundings and dealing with a figure that appears to be a twisted copy of her, Lethe also discovers that her life has not turned out the way she had planned: having a child with him. that she has had. a relationship that falls apart. Despite all the difficulties she encounters, the question arises that it might be better for Lethe to stay in this new world after all.