Tallstar is sitting in his den when Barkface asks him if he wants to take a walk. Tallstar agrees and he walks with his old friend. They talk about Shrewclaw for a bit, reminiscing about the old times, before Barkface suddenly stops. Tallstar turns to make sure he's okay, but Barkface is staring up at the sky, watching as a shooting star crosses the sky. Barkface's eyes widen and he goes rigid for a second before he blinks and turns back to Tallstar.

StarClan has given me a sign, he says. Fire alone will save our Clan.

Tallstar is plagued by the thought of the prophecy and goes to a place he can think. His thoughts are going a mile a minute and he doesn't notice as Jake walks up to him. He jokes to Tallstar, and Tallstar is more than happy to see his best friend again. Jake tells him that he needs Tallstar to come with him, and although Tallstar doesn't know what's happening, he needs some fresh air, so he goes with him.

Jake leads him to his mate's house, where he nods to her and then turns to Tallstar. This little tom has a warrior's spirit, Tallstar. I want him to become a warrior. Take him to WindClan?

Tallstar looks down at the tiny orange tom, a pure copy of his father. His heart surges with affection he didn't think possible, and he turns to Jake. Are you sure?

Jake nods. Yes. I know he needs to be in WindClan. He would never be happy here. He glances at his mate, who, while she looks sad, she also looks very sure.

Okay. I will take him. Do you want to name him first? Tallstar asks.

Jake nods again, smiling at the tiny version of him. Firekit.

Tallstar's mind whirls, thinking of the prophecy, but he shakes it from his head and smiles at the tiny tom. Firekit is perfect. I'll make sure he's the best warrior WindClan has ever seen.

Jake chuckles, smiling at Tallstar. That job was already taken when you became a warrior, Tallstar. But I'm sure he will be.

So, Firekit grows up in WindClan with Onekit. He becomes Firepaw, an apprentice of Deadfoot. Brokenstar attacks WindClan and drives them out, both Firepaw and Tallstar feeling torn about leaving their homes. Tallstar, while he loves Firepaw like a son, he begins to doubt the prophecy, or at least, his own answer to the prophecy. Firepaw was just an apprentice, what could he do to help the Clan when even StarClan seemed to not want to save the Clans from Brokenstar.

Over in ThunderClan, Firepaw never joined, so things happen just a little differently. Ravenpaw still bursts into camp announcing that Redtail is dead, but in this version, family is a little more important. Dustpaw loves his brother and while he doesn't want to believe that Tigerstar killed Redtail, he trusts his brother. Longtail, as well, doesn't want to believe Ravenpaw, but as they are all family, their familial loyalty is stronger than Clan loyalty. Longtail begins to do what Fireheart did in the series. Longtail is the one who finds Yellowfang and brings her to ThunderClan, and she stays in ThunderClan after Spottedleaf is murdered by Clawface. Graypaw and Longtail help Ravenpaw get away to the barn to live with Barley. Dustpaw and Sandpaw help in driving Brokenstar out, earning their warrior names of Dustpelt and Sandstorm.

Through Longtail's urging, Bluestar sends him and Sandstorm to look for WindClan. They eventually find them in the sewers and bring them back. Sandstorm takes a liking to Firepaw. Firepaw finishes his training quickly and earns his warrior name Firespirit. Graystripe still has kits with Silverstream and she still dies, but Graystripe will stay with his kits in RiverClan, becoming a RiverClan warrior. Leopardstar doesn't trust him at first, but she will.

Tigerclaw rises through the ranks, and eventually does actually murder Bluestar, placing the blame on the rogue attack and becoming leader; he names Darkstripe as his deputy. The forest fire still happens, and Tigerstar takes this as his chance to make an alliance with RiverClan.

Within all this, Brokenstar has been killed by his mother, and Blackfoot drags himself back to ShadowClan, saying he has made mistakes and should never have followed Brokenstar. Runningnose says he can stay, but is to be watched at all times. Under Runningnose's decision, and StarClan's blessing, Russetfur is named ShadowClan's new leader, and eventually Blackfoot becomes her deputy.

Firespirit begins meeting with Sandstorm at the border, and although he knows he shouldn't, he begins to love her, and she begins to love him. Sandstorm brings him news of the tyrannical rule under Tigerstar and his plans to join RiverClan and ThunderClan, and Firespirit knows he has to do something. He goes and talks with Tallstar, and says that he knows ShadowClan has had a troubled past with WindClan, but with Russetstar as the new leader, they should be given a second chance. Tallstar is willing to hear his son out, and together, he, Firespirit, and Deadfoot go to speak with Russetstar and Blackfoot about joining forces. Should Tigerstar ever attack either of them, the other would come to help; Russetstar agrees.

Because he doesn't need to get revenge on ThunderClan for evicting him, the whole dog thing doesn't happen, and Swiftpaw and Brightpaw become Swiftclaw and Brightheart. Firespirit earns Gorsepaw as an apprentice. Tigerstar talks to Tallstar about joining forces with him in the new TigerClan, but Tallstar refuses. In retaliation, Tigerstar attacks WindClan with ThunderClan warriors. But when Sandstorm sees Firespirit, she can't bring herself to hurt him, and she flees, not wanting to hurt anyone he cares about. However, Tigerstar orders Darkstripe to kill Deadfoot, and he succeeds, and Tigerstar says it's a warning for not joining forces: Tallstar will join TigerClan or more of his clanmates will die. Tallstar and Firespirit and the whole of WindClan mourn Deadfoot's death, and Tallstar names Firespirit as his new deputy.

Tigerstar still makes the "alliance" with BloodClan, and with Sandstorm's help, Firespirit is able to reveal everything that Tigerstar has ever done. Scourge still kills Tigerstar, and BloodCLan still give them the three days to the Clans, but they obviously refuse, and the big battle happens still.

Although Darkstripe is technically leader of ThunderClan, Longtail stands up to him, objecting that BloodClan would kill them all anyway and he has the whole of ThunderClan at his back. They kick Darkstripe out and Cinderpelt names Longtail as ThunderClan's new leader. He refuses to get his new lives and name, saying he'll get it when the Clans have beaten BloodClan. Longtail names Whitestorm as his deputy.

In the battle, Darkstripe is still killed by Graystripe, earning more respect from Leopardstar. LionClan fight BloodClan, and Whitestorm is still killed, as well as Bone, in the same ways. The four allies, aka: Firespirit, Graystripe, Sandstorm, and Blackfoot, all attack Scourge at once, and Firespirit is the one to deliver the killing blow. With BloodClan's leader dead, BloodClan themselves flee, and LionClan can finally relax. Longtail is devastated at the death of Whitestorm, but he names Sandstorm his deputy.

Sandstorm is torn; she has learned that she is expecting Firespirit's kits, but she doesn't want to and shouldn't leave ThunderClan: she is now the deputy and ThunderClan is her home. Firespirit understands: he can't leave WindClan to be with her, even if he wants to be there for his kits, but he is also the deputy and doesn't want to leave his father and WindClan. They agree that they love each other, but can't leave their own Clans.

Sandstorm does eventually have Leafkit and Squirrelkit, but she raises them in ThunderClan and they still go into training to become medicine cat and warrior.

Like the Tigerfoot AU, this one is going to stop here for the moment. I don't know how much that would change the entire series. Crowkit is still the kit of Ashfoot and Deadfoot, but he would have been born earlier; he would just never know his father. Cloudtail still exists, but he never joined ThunderClan or WindClan.

So, yeah! So far, that's my Firespirit AU. Let me know what you guys think!