The Dragon's Den

I have read a lot of fic so I will try to put it simple. Its a Transfomers fic and it slash Sam/Bee. Sam becomes a autobot. I think because of the all spark or the primes. This takes place after egypt. I can't remember how Sams splits up with Mikaela but I know is was not a bad split. Sam goes back to college and bee follows using holos. The is holo!sex between them. Sams transforms in to a bugatti, the fastest car in the world (Bee picked it). Sam is also becomes a Prime. Those are the only facts I rememeber for certain.