After of the events of Godzilla vs Zilla, Dr. Nick Tatopoulos is devastated at the supposed death of Zilla. He then forms H.E.A.T which ends up getting attacked by a group of eco-terrorists known as Celestia which results in H.E.A.T merging with Monarch. Nick later discovers that not only is Zilla still alive, she is also Monster Island's natural predator.
