Champion dog trialist, Sheepdog Buck, returning to New Zealand from a successful world tour, is stuck in quarantine with three others – British Bulldog Horatio, French poodle Fifi and the mysterious Dolores del Mar from Mexico, who claims to be a chihuahua but is in fact a rat trying to infiltrate New Zealand. They share stories and songs and language about doggy life back in their own countries. And then Dolores suggests a daring escape plan!