The Samurai Power Rangers continue their battle against the evil Master Xandred who has now joined forces with the malevolent Serrator. To fight this growing threat, the Samurai Rangers learn to use the legendary Black Box to form all new Megazord combinations and become Super Samurai. Through teamwork, they also learn to invoke the power of their ancestors to morph into Shogun Mode and protect humanity from the Netherworld's vile villains.