ThestoryconcernstheWaterburyfamilywhomoveto"ThreeChimneys",ahouseneartherailwayafterthefather,whoworksattheForeignoffice,isimprisonedasaresultofbeingfalselyaccusedofsellingstatesecretstotheRussians.Thethreechildren,Roberta(Bobbie),PeterandPhyllis,findamusementinwatchingthetrainsonthenearbyrailwaylineandwavingtothepassengers.TheybecomefriendlywithAlbertPerks,thestationporter,andwiththeOldGentlemanwhoregularlytakesthe9:15downtrain.Heiseventuallyabletohelpprovetheirfather'sinnocence,andthefamil小时候一个暑假的下午，我无意中看到了这个电影，后来读了原著，现在每每回忆起来，总会想到那个下午灿烂的阳光，很温馨，只可惜这部电影现在很难看到了。