Set in San Francisco, housewife Jessica Barret (Juliet Mills) has just discovered she is pregnant with her third child from her record producer husband, Robert (Gabriel Lava).
But, this particular pregnancy seems to be growing at an alarming rate. Not only this, but the further along with her pregnancy, the more unhinged she seems to become. Swearing, violent outburst, sudden bouts of exteme illness. Then, to top it off, she starts to exhibit signs of demonic possession (IE, spinning head, bad complexion, levitating off the bed, speaking with strange voices etc).
Deciding to commit her, Robert is subsequently approached by a man named Dimitri (played by Italian regular Richard Johnson) who claims to know what is wrong with her and assures him that she'll be fine once the child is born, but she must remain at home and not have any visitors.
But of course, we all know that won't be the case as it seems Dimitri belongs to some sort of Satanic cult and there's a special reason why they want this baby to be born.
Produced by infamous Eurohorror distributor Ovidio G Asonitis this was basically an Italian rip-off of "Rosemary's Baby" (1968) and "The Exorcist" (1973) mashed into one. It isn't bad as far as low budget Italian supernatural shockers go, though there's some really confusing stuff about a funk band, that Gabriel Lava's character is producing, and who may somehow be involved somehow, which all seemed rather pointless and I really wasn't sure what to make of the ending (which I won't spoil for you).
Anyway, it's worth a watch if you enjoy this sort of thing, otherwise, just stick with The Exorcist. But don't expect anything too original.