Karel Novak is an incredibly naive Czech immigrant who is taken under the wing of streetwise New York chorus girl Sylvia. With the help of lovable cop-on-the-beat Murphy, Sylvia hides Karel from the immigration authorities and ultimately falls in love with him. In addition to Karel's illegal-alien status, the plot is complicated by a crooked lawyer and a group of well-meaning welfare workers who endeavor to place Sylvia's kid brother Frank in a foster home.

Refusé comme immigrant parce qu'il n'a pas les 200 dollars demandés, un Tchèque saute du bateau, se lie d'amitié avec une fille et devient chauffeur de taxi.

Cuenta cómo un inmigrante checo, Novak (Lederer) recién llegado a Nueva York, y a punto de ser repatriado, se escapa "in extremis"; tras varias peripecias, conoce a una corista, Silvia (Rogers) y a su hermano de 11 años.