What if Luna failed to save Anakin from himself? This is a little "What if" that got a bit too carried away and became its own story. I would suggest reading A Long Time Ago, In a Galaxy Far Away to understand what is happening and what has happened, but it's up to you. There will be a summery below for you, if you do...
In which you can see some of the alternate ways Luna and Eclipse's combined story could have gone should something have been changed or altered. Each part is a story in its own right. I recommend reading the Darkside of the Moon (found on my main account @Amithisia ) before this so you know one of the main characters...