Determined to actually take his fortnight's leave this year, "Jamison" (Eric Blore) stages what amounts to a mini-revolt against his boss "Lanyard" (Gerald Mohr) - even refusing to do up his bow tie for him. The compromise - well they are both going to Mexico. Of course, trouble is never far away and when a croupier is killed, suspicion falls on the "Lone Wolf". Meantime, they also encounter the outwardly wealthy "Agatha Van Weir" (Winifred Harris) who is $50,000 in the hole to the crooked casino owner "Henderson" (John Gallaudet) and who has been using her diamond as collateral. Clever people ...