When an asteroid unleashes a horde of alien monsters known as Bio-Titans, Earth must turn to a suit of extra-terrestrial battle armour to save the day - but there's just one catch. Because the only creature on the planet capable of turning it on... is an 11-inch-tall terrier named Holly. With the Bio-Titan threat escalating by the second, Holly and her scientist owner Sam will find their unique bond tested, as he trains his mischievous mutt to become not just man's best friend, but humanity's only hope.