Samantha can't wait for the holiday break from school. But there's no time to relax: Brynna's baby is due any day; the local authorities are gathering more mustangs from the range; and her best friend Jen's ranch is in upheaval-;its owner, Linc Slocum, has just been arrested, and no one is sure what will happen to Jen and her family.

But then, disaster strikes: A terrible blizzard traps the Phantom Stallion's band. Sam has to help them, but she's terrified they'll be captured. Can she save her beloved mustangs and keep them free-;for good?