Please don't shout, we can hear you fine.

I know I've read the beginning of one but I can't think of the name. There is a B/A/R one called Heartbeat by Mistress Ace where Spike is the only one who can rescue Buffy from the Initiative where she is being tortured but I haven't read most of it yet so I don't know how how it all winds up. But the fact that there is no 'S' in the pairing listing doesn't bode well for ultimate spuffiness even though Spike is the rescuer.
I'll keep looking, I know I have one...