Japanese sci-fi. In 2003, a highly classified military experiment involving magnetic shielding goes disastrously wrong causing the mysterious disappearance of a squadron of Japanese SDF soldiers, along with several tanks and a helicopter. In their place appears a lone, injured man dressed in 16th century period battle dress. Two years later, small black holes have begun appearing across the Japanese landscape. Capable of sucking in matter, energy and light, they threaten the very existence of the planet. Military research suggests that the 2003 experiment created a rift in the space/time continuum, effectively sending the soldiers and their weaponry 456 years back in time to Japan's Warring States era.