The fate of the Earth looks grim in the future as a war with aliens comes to a close. Milly must travel to the past during the first alien encounter so she enlists the help of Miyamoto to keep humans from extinction.
The handgun Milly uses through out the movie is a Walther P99.
Returner begins in Tibet during 2084. Last known human base gets infiltrated by the "Daggra" and promptly begin wiping them out. Milly becomes tasked with jumping back in time to kill the original alien to prevent the war.
Milly falls into October 20, 2002 onto a boat with triad. Miyamoto is also on the boat seeking Mizoguchi for revenge. He fights through the thugs and accidentally shoots Milly. Mizoguchi escapes while Miyamoto takes Milly home to help her recover.
Milly and Miyamoto.
She enlists Miyamoto's help and they pursue the alien. The crash site is covered up as a rocket explosion. The "Daggra" and ship are housed in the science institute. Mizoguchi hears of this alien and goes to the lab. His meddling leads to the alien causing his ship to shoot a hole through buildings, cars and trees. Milly and Miyamoto investigate the day after. They make it to the alien first and Milly reconsiders killing the alien. Mizoguchi and his death squad quickly come in and capture the alien and space ship.
New information is obtained, from the local black market dealer, about the alien. They head off to an oil rig. Many gun fights later, the two heroes are triumphant in saving the alien. Mizoguchi lays dead and the "Daggra" pick up their comrade. Milly fades away leaving Miyamoto by himself.
Miyamoto gives up his guns and walks away into the rain. A criminal spared from the boat, shoots Miyamoto in an alley. He gets up moments later and checks his coat. Milly saves his life with a note on a bullet proof piece of metal. The film ends with Miyamoto walking away with the rain stopped.