Tom falls in love with Becky Thatcher, a new arrival in town, who returns his affection initially, and even agrees to an 'engagement'. However, after a slip of the tongue from Tom, she walks off in a huff. From innocent and imaginary adventures, Tom's life suddenly takes a new turn. One night, while Tom and Huck Finn are in a graveyard, they witness an incident they should not have. Terrified, they flee from the spot, and swear a blood oath that they will never reveal their secret to anyone.