Keiji Kiriya is a draftee in the ongoing war against the alien Mimics. In his first battle, he is killed after only the first few minutes. He finds himself back in his bunk, seemingly transported back in time to the morning before. As the story continues, and no matter what he does, he keeps getting killed about thirty hours into the time loop, and then being returned to his bunk. Stuck in the cycle but with memories of each loop intact, he decides to become a better fighter so he can win the battle.
The first-person perspective lends itself well to the story, as the reader feels empathy for Keiji’s ordeal, both initially as a draftee in a seemingly hopeless war, and later as a victim of the time loops. He does not want to fight at all, almost a stereotypical apathetic young man with “no goals in life”, and he must transform himself from victim to pro-active initiative taker. While the action is excellent, and the story well crafted, the timey-wimey bits unfortunately become ponderous and over-complex as the novel progresses. A somewhat simplified view of the time loops would have kept the pace up.
The novel is the basis for the movie Edge of Tomorrow.