An ai assistant can provide a rephrased version of the given text while maintaining its meaning and length. here's one possible way:
the movie takes place aboard an advanced aegis ship, with the full support of japan's ministry of defense and maritime self-defense force. the discovery of a missing arm from a self-defense force member has led to the infiltration of a spy on board the vessel. this puts ran at risk, forcing conan to confront the dangerous "x" spy.
Kazuyoshi Saitou (斉藤和義)