As a young bear,Banjo found an egg lying down. It hatches and turned out to be a bird. Banjo named the bird Kazooie and they became friends.
Many Years Later,Banjo's younger sister,Tooty gets captured by an evil witch,Gruntilda,who jealous because Tooty is the prettiest. Bottles the Mole saw this and alerted Banjo & Kazooie. The Duo seek answers from their shaman friend,Mumbo Jumbo,who explains about Gruntilda will be taking someone's beauty. He advise them to retrieve the Jiggie to warp to other lands to seek out the Jinjos for help. At her lair,Gruntilda's cauldron,Dingpot informs her about Banjo & Kazooie's goal. She sent her minion,Klungo to stop them.
Banjo & Kazooie defeats Nipper to retrieve the Jiggies and warped to meet the Jinjos,who wished to joined them after the duo must defeat their opponent,Conga. After Banjo & Kazooie won,The Jinjos finally agree. Klungo suddenly attacked them. Banjo defeats him,but not before Kazooie is unconscious and the Jinjos are captured. Banjo retrieves her before she regains consciousness.
The duo went into Gruntilda's lair where they confront her. They soon battle her while Tooty manage to escape and freed the Jinjos with Dingpot's help. After Banjo & Kazooie overpowers Gruntilda,The Jinjos fused together to become the Mighty Jinjonator and causes Gruntilda's lair to collapse,crushing her to death. After they escape,Banjo,Kazooie,Tooty,& Bottles relax in the beach with the Jinjos.
Mid-Credits: Mumbo Jumbo informs Banjo & Kazooie about something is gonna happen between their universe and Anyone else's.
