A storm causes a Universal Dynamics cargo ship to lose six ROZZUM robots, which wash up on an uninhabited island. Only Unit 7134 survives and is accidentally activated by wildlife. "Roz" is called a monster by the frightened wildlife and injures herself trying to help them. Unable to find anyone needing her services, even after learning how to communicate with all animals, she signals for retrieval, but gets struck by lightning and is attacked by animals. While fleeing from an aggressive
grizzly bear named Thorn, Roz accidentally crushes a
goose nest, resulting in the destruction of all but one egg. After Roz protects the egg from an hungry
red fox named Fink, a gosling hatches, imprints on Roz, and accidentally breaks her long-range transmitter. A mother
opossum named Pinktail "provides" Roz with the task of caring for the gosling to ensure he can eat, swim, and fly by himself before the
winter migration. Fink discovers he can benefit from Roz who builds a shelter. Roz names the gosling Brightbill, and the three cohabitate. As Brightbill grows up, he is rejected by other geese. Upon discovering that Roz accidentally killed his family, Brightbill feels betrayed. Roz reconstructs ROZZUM unit 6262, nicknames her "Rummage", and asks for advice. Rummage, giving her transmitter to Roz, tells her to return to the Universal Dynamics factory. Roz enlists the help of a
peregrine falcon named Thunderbolt to help Brightbill learn to fly and receives advice from Longneck, a leader for the geese's migration, allowing Brightbill to master flying just in time to join the migration. Missing Brightbill and unsure of her continued purpose, Roz reactivates her transmitter but shuts it off immediately after Universal Dynamics detects her signal. During the migration, a thunderstorm forces the geese to shelter inside a Universal Dynamics
greenhouse, triggering a contamination alert that sets reconnaissance (RECO) robots after them. Longneck sacrifices himself so Brightbill can lead the flock to safety. Meanwhile, Roz and Fink save the island's animals during a severe snowstorm, urging them to a truce supported by Thorn before Roz powers down. By springtime, Roz reawakens to find the animals still following the truce and Brightbill returning, hailed now as a hero. Shortly after, a Universal Dynamics dropship captained by a Virtual Observational Neutralizing Troublesome Retrieval Authority ("Vontra") robot arrives to recover Roz. Roz flees with Fink, pursued by RECO robots dispatched by Vontra. The animals band together to fight off the RECOs, but Vontra detonates the damaged RECOs to incapacitate and capture Roz, starting a
forest fire in the process. The geese and Thunderbolt attack the dropship so Brightbill can save Roz as Fink and the others extinguish the fire. Despite Roz appearing to have been shut down by Vontra, her love for Brightbill restores her systems. Roz eventually destroys Vontra and evacuates Brightbill as the dropship explodes. Roz decides to return to Universal Dynamics to protect the island from future attacks, but promises to return. The animals continue to live together on the island while Roz works at another Universal Dynamics greenhouse, maintaining her memories. Brightbill visits her, and the two embrace. ==Voice cast==