As the unassuming court reporter, Elizabeth Cronin finds herself stepping away from the monotony of her daily grind in Minneapolis, she attempts to reconnect with her estranged husband, Charles. However, this encounter presents a brutal reality check: Charles unwaveringly desires a divorce and has embarked on a new romance with another woman, Annabella. This disheartening meeting triggers a cascade of unfortunate events that unfold like a series of cascading dominoes.
While struggling to collect her thoughts at a public phone booth, Elizabeth's day takes a turn for the worse when two would-be thieves—one snatching her purse and the other stealing her car—leave her stranded and frustrated. This unexpected misfortune forces her to return to work late, resulting in her termination from the courthouse. As she leaves the building, she unexpectedly runs into Mickey Bunce, a friend from her childhood, who brings back fond memories of their youthful adventures together, including the imaginary friend who provided her comfort during a troubled time: Drop Dead Fred.
These nostalgic memories serve as a vivid reminder of the emotional burdens Elizabeth has carried, particularly stemming from her tumultuous relationship with her mother, Polly. Flashbacks provide insight into the complex dynamics of her connection with Fred, highlighting both the joy he brought into her childhood and the chaos that often ensued. This delicate balance reflects her repressed feelings toward her overbearing mother and her yearning for a sense of liberation.
After a pep talk from Janie, Elizabeth makes the ill-conceived choice to move back in with her mother, who immediately chastises her for the divorce. In an effort to rekindle Charles' affection, Elizabeth undergoes a makeover in hopes of impressing him. However, this new persona is short-lived, as it is soon interrupted by Fred's dramatic reappearance.
Initially, Elizabeth believes that Fred has returned to help her regain her confidence and charm Charles. Yet, his mischievous antics only serve to intensify the chaos around her—destroying a restaurant, sinking Janie's houseboat, and even leading Elizabeth to clash with a violinist at a mall. Concerned for her daughter's erratic behavior, Polly decides to take Elizabeth to a child psychologist, who prescribes medication intended to rid her of Fred.
In the waiting room, a poignant moment unfolds as Fred interacts with the imaginary friends of other children, emphasizing that these spectral companions are not merely figments of the imagination. Meanwhile, the medication begins to stifle Fred's essence, serving as a stark reminder of the consequences associated with attempting to suppress one's past.
As Elizabeth delves deeper into her psyche, she is reminded of a defining moment from her childhood when she imagined Fred hiding in a jack-in-the-box to escape her mother's rage. This traumatic experience left her feeling utterly abandoned, culminating in her father's departure from their home. The heartfelt letter she wrote to Fred, expressing her longing to escape with him, serves as a potent testament to the enduring power of imagination in shaping one’s reality.
With this newfound understanding of her inner self, Elizabeth and Fred devise a daring plan: to crash Charles' party, fully embracing the chaos and mayhem that ensue. As they revel in the delightful anarchy, it becomes apparent that their bond transcends the boundaries of reality, embodying Elizabeth's deep-seated desires for freedom and escape that have driven her throughout her turbulent life.
As Charles fervently attempts to rekindle their romance, Elizabeth initially finds herself excited about the prospect of reuniting with him. However, her joy is short-lived; Fred’s perceptive insights and unwavering commitment to the truth ultimately reveal Charles’ continued infidelity with Annabella. This revelation shatters Elizabeth's illusions and leaves her heartbroken, grappling with the fear of loneliness that prevents her from leaving Charles. Eventually, Elizabeth’s emotional state grows precarious, culminating in a dramatic collapse.
Upon recovering from her physical and emotional exhaustion, Elizabeth embarks on a transformative inner journey, leading to a dream sequence where she confronts her childhood self, previously imprisoned by her own fears. Guided by Fred, she liberates this young version of herself, instilling the confidence needed to reject Charles' advances and stand up against the oppressive forces that have held her captive for too long. This cathartic awakening culminates in a tender kiss with Fred, who then vanishes from her life.
When Elizabeth awakens, her newfound empowerment compels her to take a decisive stand: she fully terminates her relationship with Charles, finally rising against Polly's oppressive control. Before departing, she offers an olive branch to her former tormentor, encouraging Polly to seek comfort in the company of others to escape her own loneliness.
As Elizabeth enters this new chapter of her life, she pays a visit to Mickey and his daughter, Natalie, only to discover that Fred has taken up residence in Natalie’s life. Although Elizabeth is unable to perceive Fred's presence, she is left reflecting on the profound mysteries of their intertwined destinies, knowing that he remains an integral part of Natalie's world.
