Specific Eppisode

[XanderHunter]

Hi, I'm trying to think of a specific eppisode, it's the one where theres a younger girl who can see into the future and knows she is going to die, and she gets involved with the Summer's family somehow, a cult in the school is involved, along with a winter formal i think, and the eppisode ends with buffy stopping a crossbow bolt from hitting the girl, but she dies because of a disease or something.

I'm pretty sure this happen when Dawn is around, but before the last two seasons. Any help figuring this eppisode out will be greatlly appreciated.

[XanderHunter]

ok it must be pre-dawn, because i cant find it in season five, I own season six, and i'm almost positive it didnt have the slayer training academy

[z]

its in season 7 you can figure the rest out

[JamesMFan]

it's "Help" in season 7