In the year 1214, a baby squirrel falls from the nest and lands in the passing saddlebag of a 13-year-old boy. Still blind, deaf, hairless and unable to eat solid food, there is little hope for Puttermunch's survival. Moved by the persistent pleading of his distraught mother, a selection of five squirrels set out to find Puttermunch, launching a perilous and life-altering journey on the Way of St. James in Spain. The road is fraught with failure for Billowtail, Tippy, Nip, Sugarcoat and Sir Sniff, until these well-meaning tree squirrels, born to be loners and hoarders, learn the value of community and self-sacrifice.