Young Matula has succumbed to gambling and he steals money from his parents to finance his passion. His father catches him red-handed and throws him out of the house. Matula roams the world and meets Vávra, also a tramp, who accepts a job as a road-sweeper but he soon dies in a car accident. On his lone wanderings Matula finds a miraculous little key which opens all locks. With its help he acquires a great fortune. He breaks into a bank and steals more money. He then meets the daughter of the cashier who was wrongly accused under suspicion of theft and when he sees her despair, he realises his wrong-doings. Finally he wakes up - it had all been a dream. (According to the censor's certificate).
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