Emil is robbed on his first real railway journey of money entrusted to him by his hard-working mother for the relatives he is to stay with in Berlin. A gang of boys about his own age come to his aid, and a thrilling adventure full of surprises ensues as they use their wits to devise a wonderfully simple but practical trick to capture the thief.

With every detail clearly drawn - from the tiresome business of getting into best clothes for the journey, down to the final anxiety as to what shall be done with a gloriously unexpected reward - this is a story all young readers will enjoy.