A dancer with the Tommy Dorsey Orchestra is tasked with secretly transporting a magnetic mine prototype to Puerto Rico, unaware of the true purpose. As she navigates the mission, she falls for a writer who is also on board, but her trust is shattered when she overhears him discussing a character that seems to be based on her. The situation becomes even more complicated when the bags are switched, and the writer inadvertently obtains the magnetic mine. The story follows the dancer's efforts to retrieve the device and features performances by Tommy Dorsey, Frank Sinatra, and Ann Powell.

Ship Ahoy
In this espionage thriller, a gifted dancer becomes a key member of the Tommy Dorsey Orchestra, only to discover she's been recruited for a clandestine mission to transport a top-secret magnetic mine to Puerto Rico, with the true motives of the operation shrouded in mystery.