In this retelling of an Irish folktale, a brave young woman battles a sea serpent and rescues her true love from a giant. Margaret has a brave heart. Margaret has a brave heart. She dreams of adventure and longs to travel to distant lands, so when a tall ship appears in the harbor, headed north to the Kingdoms of the Cold, Margaret won't be left behind. But adventures are perilous things. Soon Margaret must face a ferocious sea serpent and even worse dangers. And she must discover the truth about an old woman with strange powers and mysterious plans, or she'll never find a way to bring herself and her true love safely home.