In 17th-century France, Father Urbain Grandier seeks to protect the city of Loudun from the corrupt establishment of Cardinal Richelieu. Hysteria occurs within the city when he is accused of witchcraft by a sexually repressed nun.

Ten boys and a dog are shipwrecked on an island in the Pacific. After a storm they discover another boat has been shipwrecked on the island. They make friends with two of the survivors, a nurse and ship's carpenter, but discover there are three other survivors who are ruthless mutineers.