Dean and Sam walk out to see the Impala missing, Dean's baby, "Sam, did you steal Baby again?" "No, maybe Charlie took it? Or Cas?" he sighs and starts walking around. He sees somebody hiding behind a car "Hey, get up!" the woman stands up "Hey Dean." she says, he stares at her, pulling a gun from his jeans "Who are you, how do you know my name?" "It's me, Baby." "Don't call me that, who are you, where's my car?" "My name is Baby, I turned human somehow." Dean shakes his head "That's not possible." "I have proof." she rolls up her sleeve to reveal scared over 'S.W' and 'D.W' carved in her arm, then lifts the back of her shirt to show a devil's trap tattooed on her back. "Holy Shit.." "Yeah, I told you. Could you put the gun away?"
He does as told "Sammy, come here!" Sam walks over, with a woman at gun point "Dean, this girl said she's the 'Pimp Car' whatever that means." he takes the gun from him "That's because something caused Baby and Cas' car to turn human.." "I have a name." she says glaring at him, Baby touches her arm "Calm down, he doesn't mean anything by that, he's never heard Castiel call you anything." Sam stares at Baby "So she's the Impala?" "Yeah, I'm still adjusting, it's weird y'know?"
~
Dean and Sam sit in the library with Baby "Any Idea where Meg went?" she asks, Dean shakes his head as he drinks some of his beer "Meg?" Sam asks "That's her name, Cas calls her it." Charlie walks down the stairs in the main room and sees Baby "Dean, Sam that's not fair you can bring a woman in but I can't?" She looks over at Charlie "Hi, I'm Baby." she holds a hand out for Charlie to shake "Wait, that's what Dean calls his car." she looks over at him "You named it after somebody?" Baby chuckles "No, I am Baby." Charlie smiles "Oh, I'm Charlie, nice to meet you." they shake hands. "This is a nice meeting but Baby, don't we have somewhere to go?" Meg asks walking in, Dean and Sam look over at her "Oh, shit. Yeah, we'll see you guys later."
Dean stops them "Where are you two going?" "Out." Baby says, "Where?" "Why do you wanna know?" "In case something happens." She ignores him and leaves with Meg, Sam looks at him "They're tough and know what to do I mean you own one and Cas owns the other." Charlie nods "They've been through as much hell as you." Dean sighs "I'm still going to follow them, for precautions."
~
Meg and Baby sit across from each other at a diner, Dean watches from a distance. "So, this is weird ain't it, being human?" Meg asks smiling, "Yeah, but it is fun. We get to see and feel what they do." "Um, yeah, about the feeling things. It seems like there is a connection between us, you think so?" Baby nods "It's love Meg, you probably don't understand it since you're basically part Angel." "That's very true." "I could show you if you want?" Meg looks at her surprised "Sure." She leans in and kisses her, Dean sees them and texts Sam 'We gotta change them back soon.' He looks up and they're gone, he leaves and sees them walking down the street "I give up, I'm going back to the bunker. Walking is hard.."
~
The next morning Dean wakes up to Sam knocking on his door "What?!" "They're back to normal, and left a note." "What?" he gets up and opens the door. Sam leads him away, the Bunker's door is wide open, Baby and Meg are cars again. There's a piece of paper on Baby's hood, he reads it 'Dean, you and Cas need to stop having sex in the backseat. P.S We promise to never turn human again, it was Rowena that helped us.' he scoffs "Those bastards..at least I have my car back.."