Yuka lives happily with her husband Koichi and his adult sister Ayumi. But on July 10, the couple's wedding anniversary, a fugitive rapist breaks into their home. Yuka and Ayumi are both raped, and Koichi is murdered before Yuka's eyes. Crying out, “Let me see Koichi one more time!” she somehow finds herself trapped in a time loop, forced to relive that nightmarish day again and again.