Popeye is on a quest to find his missing father Poopdeck Pappy. Popeye is dogged by nightmares warning him that his Pappy, who abandoned him as a child, is in danger and needs him, so he bravely sets out on the open sea to find his long-lost father. Accompanied by the admiring Olive Oyl, the brawny Bluto, and little Swee'Pea, he heads for the Sea of Mystery, which happens to be in the evil Sea Hag’s domain. Strange things begin to happen along the way, as the group encounters sirens, serpents, and menacing mists.