I intend to write a 40 to 50 page book on science fiction. I have a couple ideas that i'd like to endulge upon, however i lack purpose. I want to write about a group of characters, each with their own personal moral struggles, that have somehow bestowed upon an aquatic utopia. My orginal idea was to have the characters crash into an island after taking off from somwehere in florida. From there they would somehow be rescued by the aquatic villagers and taken under and into captivity. But then again i lack purpose. Why would they be captured? Can someone please help me polish/critique my thoughts. This is my first novel and im finding it difficult to find somewhere to even start. Any advice is greatly appriciated. Thanks!