The theft of a famous painting leads to murder and many suspects on a plush train speeding from Paris to Rome.
Sir Percy Newbiggin visits the fleet to find ways to economize Naval expenditures. Daughter Celia tags along and organizes a morale-boosting show utilizing ship-board talent. Her fiancé shows up, and romantic complications ensue.
'A secret society uses a girl as a pawn in an attempt to secure secret plans.' (BFI)
