An elderly chestnut vendor lives in poverty but once a month puts on a show with silk and a carriage to impress her daughter in a convent. One day she is robbed of her meager savings.
A nanny, in order to give in to the invitation of a suitor who proposes a motorboat trip, leaves her child unattended on land. The trip ends in a dramatic dive into the water, and while the two inexperienced navigators are picked up unconscious by some fishermen, a good devil takes the little boy...
