Michele is married to young Giorgetta and shares with her a life full of hardships on a barge over the river Seine. She is in love with Luigi, a young longshoreman hired by her husband during the loading of the barge. When Michele overhears his wife giving a rendezvous to Luigi by night, he waits for the man and attacks him, forces him to admit he is his wife's lover and finally strangles him. Then he hides the body under his cloak,(il tabarro) and when Giorgetta, in mortal fear, comes on deck and asks Michele if he does not wish her to come and rest near him under his cloak, her wronged husband throws it open and Giorgetta discovers in horror her dead lover’s body rolling at her feet.