A Siren's Calling

'We don't take care of monsters, Cas. We kill 'em. We're hunters, not babysitters!'
'I know that, Dean. But this is different. Extremely different.'

The Winchesters' cases have been their fair share of vampires, werewolves, demons. They have the pick of the litter, until Castiel calls them with a job unlike any they have had before.

A fugitive siren monarch who has ran away from her clan and an abusive marriage seeks the help of the one thing her husband is terrified of: two boys and a black Impala. Sam is willing, but Dean is reluctant. He can't trust sirens as far as he can shoot them but no one, not even his brother, knows why.

But Aurora proves to be different. Nothing like the sirens you hear about in Greek mythology, she proves to the boys that sirens are not the monsters they are depicted to be.

Will Dean accept his changing opinion of sirens after this task? Or will he still hate them for the rest of his days?