Kane, a genius inventor who has created S.I.G.M.A, a small device capable of storing massive clean energy. He lives a happy life with his beloved dog, Foster. One day, while playing fetch in the park, tragedy strikes when Foster is hit by a truck and dies. Devastated, Kane refuses to accept the loss. Using S.I.G.M.A, he builds a time-traveling wristwatch called REWINDER to go back and save Foster. But when he arrives in the past, the same tragedy repeats itself.