A detective tries to prevent the assassination of President-elect Abraham Lincoln during a train ride headed for Washington in 1861.

Harvard senior Sam Thatcher (Lew Ayres) and his best friend and roommate, known as "The Lippencott" (Burgess Meredith), plan to go to Russia after graduation, a decision Sam has kept from his girlfriend, Alexandra Benson (Maureen O'Sullivan).

A reporter covering a murder trial guesses that the murderer of a ruthless businessman is her ex-fiancé and persuades him to confess and clear the innocent man on trial.

A gang is sabotaging planes so that when they crash, the corpses can be robbed.

A Navy pilot gets involved in a romantic triangle while stationed in Hawaii.