公寓楼上楼下各住着一对夫妻，一次意外使楼下妻子流产，两家交恶。不久后双方重归于好，但楼上妻子发现，骇人的怪事不断降临她新生的宝宝，究竟是邻家阴谋，还是她陷入了被害妄想？
Stephen Campbell Moore
Justin
Clémence Poésy
Kate
David Morrissey
Jon
Laura Birn
Theresa
Deborah Findlay
Tessa
Jonathan Harden
Mark
Tuyen Do
Allergy Doctor
Laila Alj
Sonographer
Christos Lawton
Phil
Stephanie Jacob
Registrar
Natasha Alderslade
Babyshower Woman (uncredited)
Anna Madeley
Abi
Sarah Malin
Sonographer 12 Weeks
Daniel Easton
Kate's Colleague
