In La Rochelle Jean, an ambitious journalist, marries Isabelle the daughter of a wealthy shipowner but finds her cut out any inheritance. Later when he has discovered that she has been secretly added back into her father's will, he dreams about killing him and scares the old man into a heart attack. The only witness to the crime is the shipowner's nurse Angele who he seduces and now becomes his lover and accomplice, plotting to kill Isabelle so that they can claim the inheritance.