When the bubonic plague reaches Stratford, 11-year-old Judith falls dangerously ill. Her twin brother Hamnet, heartbroken and desperate to save her, lies beside her in bed. In an act of childlike devotion, Hamnet metaphorically swaps places with his sister, taking the sickness into his own body so that she might live. Hamnet dies suddenly while his father is away in London.
Agnes is devastated by the loss and harbors bitterness toward William for his absence during their son's final moments. Years later, learning that William has written a new play titled Hamlet, Agnes travels to London, suspecting he has exploited their son’s name for entertainment.
At the Globe Theatre, she watches the performance. To her surprise, she sees William take the stage as the Ghost of Hamlet’s father. When Prince Hamlet appears—played by a young actor who resembles her lost son—Agnes realizes the play is William’s attempt to speak to Hamnet, grant him an adult life on stage, and express his overwhelming guilt. Reaching out toward the stage, Agnes touches the young actor’s hand, finding forgiveness and shared catharsis with her husband.