Sally Bowles, portrayed by Liza Minnelli, is an American singer and dancer navigating life in Germany during the turbulent interwar years. Aspiring to achieve fame and fortune, she struggles with a significant drinking problem that affects her ambitions. Sally performs at the Kit-Kat cabaret, a gritty venue known for its risqué musical performances. The charismatic Master of Ceremonies, played by Joel Grey, not only introduces the provocative acts but also partakes in them, adding to the club's allure.
As tensions rise, the encroachment of Nazi ideology is subtly underscored in club interactions, highlighted by a scene where patrons are solicited for donations by Nazi representatives, only to be brusquely ejected by the club owner.
Sally's life takes a turn when she meets Brian Roberts, played by Michael York, who moves into the room she's renting in a flat shared with older residents. Brian, in Berlin to complete his PhD and teach English, is financially strapped but becomes a close companion to Sally. Their relationship blossoms into a sexual affair, although Sally keeps her heart at a distance, preferring the allure of wealth over love.
Their connection deepens, yet Sally is torn between her affections and her goal of marrying into money. A chance encounter with Maximilian von Heune, portrayed by Helmut Griem, changes everything; he assists her at a laundrette and charms her with a life of opulence. Intrigued by his luxurious lifestyle, Sally’s infatuation grows, leading her to abandon Brian for the seduction of wealth and status.
As Sally and Brian play matchmakers for the ambitious student Fritz Wendel and the wealthy heiress Natalia Landauer, the subtext of their shared struggles becomes evident. Their guidance ultimately helps Fritz realize his genuine feelings for Natalia, despite their socio-economic barriers.
Meanwhile, as their escapades unfold amidst increasing political tension, it becomes evident that their glittering lives are threatened by the rise of the Nazi regime. In a chilling moment at a beer garden, a Nazi youth singing a patriotic anthem reflects the shifting sentiments in society that they can no longer ignore.
Max, ensnared in his own tangled web of relationships, reveals his infidelity to both Brian and Sally alike, while the three indulge in an evening of excess that highlights their disillusionment. However, the shadow of looming hatred and societal upheaval begins to crush their carefree existence.
As events spiral towards the darker realities of the time, Sally reveals her pregnancy, leaving her uncertain about the father, it's either Brian or Max. Faced with this existential decision and Brian's proposal of marriage, Sally finds herself standing at a crossroads, struggling with the weight of her aspirations versus her grim present.
Ultimately, in a moment of desperation, Sally offers her fur coat as payment for an abortion, which leads to the unraveling of her relationship with Brian. With an inevitable sense of loss, Brian decides to return to England, leaving Sally to confront her fate alone.
At the train station, as Brian departs, Sally resolves to remain at the club, singing a haunting final performance of "Cabaret." Under the now oppressive atmosphere, the joyful spirit is replaced with a stark reminder of the grim realities outside, as they witness the encroachment of Nazism in the very fabric of their lives.