Trixie suspects someone of trying to sabotage the pet show that she and the Bob-Whites are staging in order to raise money to feed the starving game-birds.
"A vandal and thief is loose in Sleepyside and Mart Belden is among the suspects. Could Lester Mundy, the school prankster, be the real Marauder? But why is Mart being so mysterious lately? It's up to Trixie to uncover the truth."
"Trixie finds a wallet on the side of a road and it turns out to belong to a missing millionaire. His daughter ends up staying at the Manor House; Trixie becomes very jealous of the time she spends with Honey and Jim, and soon she is suspicious of whether or not the woman is being completely honest."