Linda's frustration with her inability to achieve orgasm causes a friend to recommend that she see a sex therapist about her problem. During the exam the therapist discovers that Linda's clitoris is located in her throat and recommends deep throating as a treatment to her ailment. Linda then goes on to experiment with this new technique as she searches for a husband.

《深入深喉》(INSIDE Deep Throat) 乃一齣解構1972年備受爭議的著名色情電影《深喉》(Deep Throat)的紀錄片，當中剪輯了大量熱辣露骨的性愛場面。

紀錄片大膽談「情」之餘還探討60年代一場傳統保守派對性解放潮派的道德戰。性革命、反淫穢法、婦權主義以及成人娛樂發展的課題亦一一解讀，從《深喉》帶出社會及文化遺產。

片中更有博學多才的學者及作家如 艾倫‧德蘇韋茲 (Alan Dershowitz)、哥爾‧韋度 (Gore Vidal)、拿文‧密拉 (Norman Mailer)、甘美‧柏麗雅 (Camille Paglia)、約翰‧屈打士 (John Waters)、艾麗加‧莊 (Erica Jong)、迪‧加菲爾 (Dick Cavett)、標‧馬艾 (Bill Maher)為大家深入淺出地解說《深喉》。