In *Five Fall Into Adventure*, the Famous Five are enjoying their holidays at Kirrin Cottage when a mysterious visitor appears at the kitchen window one night. Soon after, George and Timmy vanish without a trace, kidnapped by dangerous criminals who want Uncle Quentin's secret scientific papers. A ragged, resourceful girl named Jo, who can whistle like a bird, joins the search. When Dick is also captured, the trail leads to the ruins of Falcon's Castle, where the gang is hiding. With Timmy's loyalty and Jo's courage, the Five face a thrilling rescue and bring the villains to justice.
