Elliot and Beverly are identical twins (both played by Jeremy Irons) who turn into world-renowned gynaecologists. Both are troubled by the unbreakable bond between them as they share everything from their clinic to their women. This is until they meet Claire. Whilst Elliot enjoys seducing her, Beverly falls in love with her and wishes to break the ties between him and his brother in order to become closer to her. However, as his attempt to love unravels, so does his sanity and it becomes apparent that madness as well as blood ties the brothers together, with chilling consequences.