Professor Villeneuve ,a famous surgeon, runs a big hospital.A man of conscience, he sacrifices his family life to relieve the suffering ones.Paule,his young wife ,cannot understand his self-denial.Villeneuve's new assistant, doctor Doret ,happens to be Paule's former fiance .In spite of his friendship with Villeneuve ,the assistant has frequent rendezvous with his colleague's wife he wants to marry.One day ,when the lovers are together, a coach full of children is damaged and Paule's own child might be among the victims.He is not,but now her husband knows his marital misfortune.