Biggie Cheese, a charismatic and ambitious mouse from the humble borough of Dairy Heights, dreams of making it big in the hip-hop world. Growing up in a rundown cheddar factory, Biggie learns to hustle, selling cheese wheels on the side while perfecting his rap skills in underground cypher battles. His larger-than-life personality and smooth rhymes about “mice struggles” and “the cheddar grind” make him a local legend.

But fame comes with a price. After releasing his debut album "Moo Money, Moo Problems," Biggie Cheese skyrockets to stardom, becoming the voice of the city’s underground scene. He clashes with his former mentor, Moo Diddy, and gets caught in a feud with his biggest rival, Tupawc Shakur, a street-smart rapping dog from the rival borough of Barkside.

As the cheese stacks get higher, so do the stakes. Biggie navigates the highs of fame, from sold-out barnyard tours to cheese endorsement deals, but he also faces betrayal, greed, and the challenges of staying true to his roots. Along the way, he falls for the sultry jazz singer Velvet Purr, whose mysterious past complicates his rise.

The story culminates in a high-stakes showdown at the Dairy Awards, where Biggie must decide between loyalty to his crew or breaking free from the cycle of competition and greed. In the end, Biggie Cheese learns that success isn’t just about the cheddar you stack—it's about the legacy you leave behind.