A writer takes a job as a secretary because her scrupulous husband isn't bringing in the dough as an attorney. When her new employer is murdered, she can't seem to make up her mind as to whether she "dunnit" or not.
Members of a teenage gang are sent to the State Reformatory, presided over by the callous Thompson. Soon Patsy Gargan, a former gangster appointed Deputy Commissioner, arrives and takes over the administration to run the place on radical principles. Thompson needs a quick way to discredit him.
Best pals Penrod and Sam are leaders of a super-secret neighborhood society, the In-Or-In Boys Club. Troubles arise when a pompous prig tries to join the club and when the boys lose their clubhouse in a land sale. But there’s also plenty of time to play pranks, put on a carnival, experience the pangs of first love, and romp with Duke, the world’s best dog.
Skippy, the mischievous son of a wealthy doctor, meets Sooky in poverty-ridden Shantytown, and together they try to save Sooky's pet from a cruel dogcatcher.