This document provides a summary of Acts 1-3 of Shakespeare's Macbeth. It outlines the key characters - Macbeth, Lady Macbeth, Banquo, the witches, Duncan, and Malcolm - and summarizes their roles. It describes how Macbeth meets the witches and learns of his future title, then kills King Duncan after being influenced by Lady Macbeth. It notes Macbeth's growing madness as he has Banquo's family killed and sees Banquo's ghost after crowning himself king.