I read the whole thing in a marathon session a few weeks back, so hopefully I remember the big beats right. The central conflict is about the royal werewolf family figuring out that their lost princess is none other than Chloe, the supposed orphan and mate to the powerful Alpha, Marcus. The climax involves a huge confrontation where the rogues or rival pack who hid her identity all along try to eliminate her to prevent her claim to the throne. There's a big battle, Marcus fights to protect her, and her latent royal powers finally manifest—maybe a unique aura or the ability to command loyalty from all werewolves, that sort of thing.
It ends with Chloe being formally recognized as the Princess. She and Marcus solidify their bond, ruling over his pack while she also accepts her duties to the wider werewolf kingdom. It's a double happy ending: mate bond secured and royal heritage reclaimed. I thought the resolution for the villain was a bit rushed, though. They were built up as this master schemer, but their defeat felt kind of sudden once the truth came out. Still, if you're into the fated-mate-meets-secret-royalty trope, the ending delivers exactly what it promises.