Haven't read this one in a long time. Buffy is grieving that Spike died thinking she didn't love him as well as feeling horrible for how she treated him. She's allowed to go back to Sunnydale as it was before and spend a week (maybe 2, not sure) with Spike showing him how much she loves him. They are the only two in town. What she didn't realize was at the end of their time, he would have to experience the pain of burning up all over again and she falls apart as he dies again. I can't remember if that was the ending or not.
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