The plot follows the cow-ninjas as they work together to outsmart the Black Udder, utilizing their stealth, agility, and teamwork to create a series of elaborate and hilarious schemes. The cow-ninjas must use their unique skills to defend their home and fellow farm animals.

As the story unfolds, Seth Green's character, a witty and resourceful city cow, takes on a leadership role, employing his intelligence and quick thinking to guide the cow-ninjas through various obstacles and challenges. Along the way, the audience is treated to a blend of action-packed fight scenes, slapstick humor, and heartwarming moments of camaraderie among the farm animals.

In the end, the cow-ninjas successfully defeat the Black Udder and save their farm from destruction, proving that teamwork and determination can overcome even the most formidable foes. "Assassin Ninja Cows 2" is a lighthearted, family-friendly film that combines humor and action to create an entertaining and engaging experience for all ages.