Unicorn by L. E. Get follows Scarlet, a successful model who appears to have an enviable life filled with world travel, financial stability, and a close best friend. Beneath this glamorous surface, however, her world is unraveling due to a dysfunctional family marked by years of resentment and her sister Amelia's ongoing struggle with drug and alcohol addiction. Scarlet grapples with the emotional toll of loving someone trapped in addiction, feeling both helpless and frustrated as she tries to maintain her own life.

When her mother calls her back to Denver from Dubai because Amelia is hospitalized again, Scarlet reluctantly returns home, torn between exhaustion, anger, and a need for distraction. Faced with her sister's desperate need for help, Scarlet must make a pivotal decision that will alter the course of her life, exploring themes of family, guilt, and the complex dynamics of supporting a loved one through addiction.