Cuidado con las señoras (1968)

Henry is sent by his Aunt Nati to Madrid to begin practice as a doctor because seven years ago he finished his studies and has not yet worked. When he arrived, away from obey her aunt, decides to live together with his friend Mateo, a professional private detective. His first appearance as a doctor is to extend the death certificate of the husband of a beautiful woman that he meets on the road. The next day he sees, in a night club, the widow accompanied of the deceased. On being informed that the man is the administrator of the deceased, decides to solve the mystery with the help of his friend Matthew