When the Celtic Dáirine village is attacked in the night and half of its people lay slain or captured, the young druidess Aife takes matters into her own hands. She sets off in search of the Morrigan Sisters - two deities with power over death and fate - for with their help, she may be able to rescue those taken from her. But the Morrigan's help comes at a steep price, and Aife will have to pay it.