 Mammy has a grandson she adores even though he is a good for nothing. One day Maurice disappears and Mammy becomes blind. When Maurice finally announces his return the fond old lady is overjoyed. Unfortunately, Maurice s plane crashes and catches fire. The young man is reported missing, presumably dead. Pierre, Mammy s husband, can t bring himself to announce such a shocking news. Desperate, he finds no other solution than subterfuge : he will ask a young couple to pass themselves off as Maurice and his girlfriend...