Out of the Blue

Maryellen finds her body is not her own--something inhabits her, making her do things she's never done before. Maryellen's sister tells her she's working too hard, that Manhattan is finally getting to her, and says all this talk of extraterrestrial Sub-commander Ur Targon is silly. Maryellen has to get Targon out of her body and heart. If he needs her enough, he can find his own way back in.