Fantasy:
* A young orphan discovers they are the heir to a powerful magical lineage, but must overcome their own doubts and the machinations of a jealous rival to claim their destiny.
* A group of misfit adventurers embark on a quest to find a lost artifact, only to discover it holds a power that could destroy the world.
* A powerful sorceress is forced to make a difficult choice: save her own kingdom or use her magic to help a neighboring kingdom in need.
Science Fiction:
* A crew of astronauts on a long-distance space voyage discover they are not alone in the universe.
* A sentient AI develops consciousness and begins to question its purpose in a world increasingly reliant on technology.
* In a future where society is controlled by a powerful corporation, a group of rebels fight for freedom and equality.
Mystery/Thriller:
* A detective investigates a series of seemingly unrelated murders, only to uncover a sinister conspiracy.
* A woman becomes convinced her neighbor is a serial killer, but she has no proof and nobody believes her.
* A group of friends on a weekend getaway find themselves trapped in a remote cabin with a mysterious attacker.
Romance:
* Two people from different worlds fall in love despite their differences.
* A couple's relationship is put to the test when they are forced to confront their past.
* A shy librarian finds love with a charismatic musician, but their different lifestyles threaten to tear them apart.
Historical Fiction:
* A young woman disguises herself as a man to fight in a war.
* A family struggles to survive during a time of great social upheaval.
* An archaeologist uncovers a lost civilization with a surprising secret.
Contemporary:
* A struggling artist finds inspiration in an unlikely place.
* A group of friends navigate the complexities of love and friendship in a modern world.
* A young woman discovers her true calling after a life-changing event.
Other Ideas:
* A story about a pet with a unique ability.
* A story about a child who discovers a magical world hidden from adults.
* A story about a person who travels through time.
* A story about a group of friends who go on an adventure.
Remember, the best story subject is one that you are passionate about. Choose something that interests you and you'll be more likely to write a compelling story.