When the ultra-powerful heir of an ancient line of shinobi warriors sees her dynasty crumbling, she turns to a renowned myth in an effort to change her fortunes. The Sacred Treasures of Japan are more than relics to its people; they are the Imperial Regalia and have achieved a legendary divine status.But the treasures on display in the museums are fakes; the real ones long lost.In Hawaii, Matt Drake and his team are attacked by covert shinobi fighters. Afterward, with friends abducted, the team have only one option: Travel to Japan and unravel the mysteries that veil the Three Sacred Treasures and a secret, mythical fourth.The team must infiltrate Mai's old clan, the vicious and deadly Tsugarai ninjas, in a desperate effort to save the lives of their friends and embark on a perilous quest to locate the treasures in such notorious places as the Devil's Sea - a Japanese Bermuda Triangle - and The Land of the Dead.In their deadliest confrontation yet, Drake and his team face shinobi warriors, the shadow royals of Japan, and an ancient line of Samurai in an epic quest to acquire the Three Sacred Treasures whilst solving clues that lead to a fourth--the unique source of some of the greatest myths of East and West that have baffled relic hunters for centuries.