
In a fashion studio, a wearer eats a candy contained in a red box and dies poisoned. Nero Wolfe and Archie are called into question by Enrico Frost, cousin of one of the models investigated for murder (Elena). Wolfe quickly realizes that the main suspect is Elena who gave the tailor Lello De Angelis the box of candy, but did not take. While Elena's family proves to be very hostile to Wolfe, the girl reveals that in a month (when she reaches the age of majority) she will inherit a fortune ... She also tells him she is very attached to De Angelis: her family has known him since the war and then they lost sight of them for years and then found themselves in Rome.
As soon as he arrives in Rome with his faithful assistant Archie Goodwin, the famous American investigator, Nero Wolfe, is contacted by his first client: a woman asks to find a boarder in the hotel where she works, disappeared for days
Recruited as a chaperone at a reception for mothers-girls, Archie Goodwin assists helplessly with the death of one of the two young escorts, Lucia, poisoned with arsenic. The police are sure it is suicide, but Archie is convinced of the opposite, and initially Nero Wolfe suspects the victim's ex-boyfriend, who had been abandoned to the news of the pregnancy and later lost the child.