The Darkest of Nights: A Warrior Cats Fanfiction

After the battle with the Dark Forest cats, there was supposed to be peace. However, it seems to be the exact opposite. A mysterious warrior is attacking ThunderClan cats. Lionblaze, Cinderheart, and Rosepetal have their own love triangle. The Clans fall into chaos when a greencough outbreak emerges, affecting even the medicine cats. To top it off, a new group of cats moves into Clan territory with no intention of leaving. Could this be the end of the Clans- forever?