A daring boy named Cody unlocks an ancient seal, releasing an enormous BullZord, the very first Samurai Zord, which rampages across the countryside. The Power Rangers must fight to save the city by capturing the beast and taming it to serve as their newest Megazord.

Serrator takes the first step in his mysterious master plan to seize the earth by clouding the minds of the people of the island Monalua, spreading paranoia throughout the residents. To stop Serrator, the Rangers will need a special new weapon, the Bullzooka!

The Nighlok Fiera unleashes an overwhelming attack on the Red Ranger, but when he goes down another Red Ranger takes his place. Which one is the real Red Ranger? The answer will change the Samurai Rangers forever.

When Noah has trouble lifting Jake's heavy weapon, he begins to doubt his abilities, until he learns that believing in yourself is all that's necessary to get any job done.

Chase tries to impress his new girlfriend, Kaylee by showing how talented and accomplished he is. But when it becomes more about him and less about her, Kaylee starts to fall for the Black Ranger instead.