Golden Dawn, a sorrel mare, gives birth to a foal, Tatum. But when flash floods pour down from the mountains, they wreak havoc in the meadow and little Tatum goes missing. Could the foal have survived the flood? Kirstie and Golden Dawn set off upriver to find out. Ahead lies danger - sub-zero night temperatures, coyotes and mountain lions, and of course the ever present threat of another disastrous flood...