Bunny, cannot honour his gambling debts. He turns in desperation to one of his old schoolfellows. Raffles, was brilliant at school, is now a world-class amateur cricketer and a handsome gentleman, welcome in all the finest houses. He agrees to help his friend, but, to Bunny's amazement, he confesses that he is a thief, a 'cracksman' or safebreaker. He asks Bunny to help him with his exploits. Shocked, he agrees. The book is Bunny's chronicle of many audacious adventures and burglaries.