At the end of Chosen when Buffy tells Spike she loves him, he belives her and doesn’t try to deny her feelings.

After he dusts, Spike is not trapped in the amulet but in a hell dimension and the last thing he remembers is that Buffy told him she loves him so he’s highly motivated to get back to her (and Dawn).

The hell dimension he’s trapped in is one big desert that he has to go through to get back to Buffy. On his way he comes across a number of mirages that he has to either fight to get past them or resist their temptation to stay/return to where he came from. The mirages can be anything you want: apparitions of people (similar to the First), places he should/shouldn't visit, or scenes from his life that he will try to interact with, etc.

Obviously as he’s not trapped in the amulet, when he gets out of hell, he will not be in LA/with Angel, so no noncorporeal nonsense should take place. Once he’s back, he’s automatically brought to Buffy because the last place where he was loved was with her.

Just to make it more interesting though, it’s up to the author what Buffy is doing in the meantime, how she’s coping with her new life; if she started dating again or if she’s officially retired as a Slayer and living somewhere far away from everyone, or if she decided to find out where souled vampires go after dusting and see if maybe she can get him back...

Obviously a happy ending would be greatly appreciated 

***Inspiration for the challenge:

Alejandra Pizarnik, tr. by Yvette Siegert, from “The Dream of Death, or the Site of the Poetical Bodies”, Extracting the Stone of Madness: Poems 1962 - 1972