When planning a good story what do i need

this is my basic plan for the story

Mia & her twin brothers (triplets) are arms dealers like their parants they go for a meeting in new york with a major arms dealer (Jaxon) Jaxon takes an interest in Mia & vows to find out everything about her but Mia is scared to love after her ex broke her and beat her and tortured her in his basement for months so when Jaxon tries to get close to her it scares her

Duplicate thread closed. Please refer to original: Need Some Story Advice & Also Need A Name For The Story (LIMELIGHT)