Unto the Haunted

It begins and it ends in fifth year, but without Death there can be no life. During the hunt for the Horcruxes Harry receives news he is not sure he can believe. And even if he does, it was never easy. Sirius!returns. Harry/Sirius. Observe: SLASH, underage (15/36), godson/godfather, angst, allusion to minor and major character deaths, death themes in general. (But! Happy ending)