Godzilla vs. King Ghidorah

When a mysterious U.F.O. is seen flying over Tokyo, tension mounts, until the craft's occupants reveal themselves to be friendly terrestrials from the 23rd century who have come to warn mankind that Godzilla will soon awaken and wreak havoc upon the Earth unless he's destroyed. Meanwhile, a triple threat arrives in the form of King Ghodorah, Godzilla's flying three-headed arch rival. (official distributor synopsis)