Living rough and fighting the invading Vikings, Brian Boru has no more money to feed his troops, and the Vikings at Limerick have a hoard of looted treasure, but it's closely guarded.... Fourteen-year-old Conn, from Drumshee, is the youngest soldier in Brian Boru's makeshift army. After a hard battle, he and his men retire to Drumshee to rest; on the way, Conn captures a Viking boy named Ivar. The two boys and Conn's sister, Emer, become friends.