2 years after Rey decides to stay on Tatooine, she receives a message from General Poe, regarding force sensitive rebels who are capable of using the force without being trained. One of these individuals is her dearest friend, Finn. Finn personally asks Rey to train him to be a Jedi. Though Rey has learnt to master the force, she will learn that to truly master something you must teach it to someone else.
Rey has found peace in many places within herself, but one part of her remains hollow. She has not been able to fill the void that could only have been filled by the other half of her dyad, Ben Solo. For two years, Ben has not shown himself to her; not the way Leia and Luke had... not at all. She would have loved just to see him once more; just to hear his voice one last time.
She decides to train Finn. Perhaps, she thinks, it will take her mind off of... him. While training Finn, she happens upon new realisations of the force she had not previously known. She might just know how to bring Ben back for good. She embarks on a new mission; to learn something, realise something or, hopefully, more than the others, to bring Ben Solo back.