 The being is defeated by Prof. Maracot who becomes possessed by the spirit of Warda, the man who managed to convince a handful of Atlanteans to prepare for the worst and thus built an Ark which saved them from the cataclysm which destroyed their land.Although a short novel, it provides interesting glimpses into the belief regarding the sea during the early 20th century and particularly Sir Arthur Conan Doyle's own beliefs and outlooks.The dramatic end mentioned at the end of the novel, the fight between the ultimate Good and Evil reveals the deep spiritual nature which Conan Doyle had developed in his later years.