Warner Oland

Botanist Wilfred Glendon (Henry Hull) travels to Tibet in search of a rare flower, the "Marifasa Lupina," which blooms only in moonlight.

Passengers on the Shanghai Express are concerned that the notorious Shanghai Lil is on board. A British Army doctor knew her before she became a 'coaster' - a woman who lives by her wits. When guerrillas stop the train he's taken hostage. Lil saves him but can she convince him she hasn't changed?