Floss is a four-year-old Highland cow whose content and happy life is turned upside down when her newborn son is cruelly taken away from her. Under the guidance of her best friend, Ned the Donkey, she determines to escape and to find and rescue her son. During her nine months as a fugitive in the Lincolnshire countryside, Floss is befriended by a fourteen-year-old girl Susie, who commits to helping Floss in any way she can. Matters take a nasty turn, though, when Floss is recaptured and destined to end up as food for humans. Can Susie save the Highland cow she has befriended, or has Floss's time finally run out?