当陷入婚姻倦怠的法官之妻Hester Collyer（海伦•麦克洛瑞饰演）被邻居们发现自杀未遂的时候，她和前皇家空军飞行员Freddie（汤姆•伯克饰演）的婚外恋情以及和丈夫William Collyer感情破裂的事实浮出水面。寂寞、压抑和情感渴求，在二战后虚伪而脆弱的复苏表象背后，有一种残酷的渴望和绝望在燃烧。
该剧为英国舞台剧作家泰伦斯•拉提根（Terence Rattigan）创作于1952年的作品，故事有他自己一段隐秘情事的影子，同年即在英美两国相继上演，此后多次重排，并且被翻拍成影视剧作品，著名版本包括1955年费雯•丽主演的电影版，2011年蕾切尔•薇兹、汤姆•希德勒斯顿和西蒙•拉塞尔•比尔主演的电影版，及1994年科林•费尔斯的电视版，其经典程度可见一斑。
海伦•麦克洛瑞（Helen McCrory）在《美狄亚》和The Last of the Haussmans之后再度回归英国国家剧院！再度与导演凯莉•克拉克奈尔（Carrie Cracknell）导演复排的经典剧目《蔚蓝深海》。
The Deep Blue Sea begins with the discovery by her neighbours of Hester Collyer who has tried and failed to commit suicide. Some time before, she left her husband, a respectable High Court Judge, for a semi-alcoholic former R.A.F. pilot, 'Freddy Page'. The relationship was physical and passionate but his ardour has cooled, leaving her emotionally stranded and desperate. The aftershocks of her attempted suicide unravel even the remnants of this relationship, but by the end she is brought to a hard decision to live, partly through the intercession of another resident of the tenement house, Mr. Miller, an ex-doctor, struck off for what seems to have been a homosexual offence. These two outcasts, socially ostracised for their 'excessive' loves, find a curious and moving kinship.
