George gets a letter from a college gal, majoring in botany, and has a strange problem involving flowers, and murder.
It turns out that she and her husband are both freshmen at the university. They are a little older because of being veterans of the recent war, and both are using their GI Bill benefit. . To make things even more strange, and uncomfortable, they have a son who attends the college as a sophomore.
The mystery involves a project she is working on with her professor with a new strain of orchid. The son is upset that a love triangle might be going on. Or at least concerned that the rumor mill thinks his mom has a thing going on with the professor. George and Brooksie make the rounds interviewing the folks on the campus. The rash of accidents takes a more serious turn when they discover a body in the greenhouse, it looks bad for either the son or husband.
By now, all the clues are in, and George calls the cops to have all the remaining players gather together in the greenhouse. The mystery is solved in classic mystery novel fashion.