Phil is about to graduate at the School of “Detecatufs,” and he and the chief are trying the effect of various disguises on each other. A suspicious party is registered at the hotel, and the detecatufs are called in. They disguise themselves as porters and busy themselves with the baggage, in order to divert the attention of the guests. The bride, Lucille, and groom arrive and register at the desk. Soon after another pair, with Merta as the bride, also appear and ask for rooms. Their trunks are delivered and Phil is told to take them upstairs. He takes up Lucille’s and leaves it outside her door, going down for Merta’s. Charles comes along and take Lucille’s down on the elevator, under the impression that it was left there to be taken away. When Phil staggers up the stairs with Merta’s, he is horrified to find Lucille’s gone. In the confusion the trunks are delivered to the wrong rooms, and Merta nearly has a fit when she opens the one in her room and finds clothes much too small for her in it. Phil and Charles, meantime, have made many changes in make-up and succeeded in deceiving no one but each other. Each thinks the other a suspicious character, until his disguise is removed. The trunks become hopelessly confused, each taking the wrong one into the hall. For some unknown reason, they find themselves on the roof, where they do stunts with the trunks over the edge. One trunk is landed on the telegraph wires, with the detectives and guests after it. There is a battle for the possession of the trunk high up above the city. At last trunk, detective and guests fall together in one heap.