The Forged Coupon

The story is divided into two parts. In Part I, schoolboy Mitya is in desperate need of money to repay a debt, but his father angrily denies him assistance. Dejected, under the instigation of a friend Makhin, Mitya simply changes a $2.50 note to read $12.50, but this one evil deed sets off a chain of events that affects the lives of dozens of others, when his one falsehood indirectly causes a man to murder a woman at the end of Part I, and then seek redemption through religion in Part II.

(Excerpt from Wikipedia)