In Irish mythology, a mystical place lies beyond the Coast of Ireland, far out across the sea. Said to be the home of the Irish Sea God Mac Lir, these mystical islands, known as the Otherworld, are invisible to the naked human eye, devoid of sickness and death, and a place of eternal youth and beauty. One only reaches these islands by conquering the Ninth Wave, the greatest of all waves and the barrier that separates the Earthly world from the Otherworld.