One day Vick receives a mysterious machine from an old friend. As he seeks to discover the true power of this device he also learns of an unexpected visit from his estranged father. Briar and Bramble, the two bear brothers always getting in Vick’s way, are in for a rude awakening. Vick heads out to shrink them out of his life. In the tussle the device is tossed and all three of them are caught in the beam and find themselves looking up at the rest of the world. The tiny team has to get back to the device to reverse the effects, but their efforts are intercepted by Vick’s dad. The three now go on a wild chase through a magnificent world just underneath our feet to not only restore their size, but to restore family.