Well, we found out that Deucalion went blind because of Gerard Argent. Which...not really that surprising given what a douche Gerard is. He kind of lost his mind after Gerard blinded him. Turned against what was left of his pack and killed them. He got the idea of putting together an alpha pack sometime after that. Turns out that Jennifer was Kali's emissary. Deucalion convinced her to kill the rest of her pack, including Jennifer. Except Kali didn't exactly get the job done. She left her for dead, but she didn't die. The Nemeton brought her back from the brink of death. And she came back wanting revenge on all of them.
They went after Morrell, too, and almost killed her. Deucalion wanted Scott to join his pack. He seemed to know that Scott was going to end up being a true alpha, but I don't know how. He tried to make Scott kill Jennifer but he refused. Jennifer restored his eyesight and he ripped her throat out. She tried to get back to the Nemeton, I assume to try and save her again, but that's where her body was found.
You and Scott let him go and told him he was getting his second chance and not to waste it, basically.
But I don't know anything about him sending anyone to rescue you. I didn't know anything about you needing to be rescued at all actually.