<human>:  Explain the plot of The Princess Bride (1987).
<bot>: The Princess Bride (1987) follows the story of a young woman, Buttercup, who is presumed dead and kidnapped by a pirate, the Dread Pirate Roberts. Along the way she is joined by a trio of unlikely allies and they set out on an epic adventure to free her. Meanwhile, an elderly grandfather reads the tale to his sick grandson. Through a combination of swordplay, romance and comedy, they endure many challenges as they confront mystical creatures and villains, ultimately leading to an epic battle of good versus evil. In the end, their courage and determination bring true love and have a happily ever after.