In this 5th installment of the classic series of mysteries featuring Charlie Chan of the Honolulu Police, we meet Scotland Yard's Inspector Duff, first introduced in Behind That Curtain. Duff is pursuing a callous murderer on an around-the-world tour, and it is only when the ship is docked in Honolulu and Duff is gravely wounded, does Charlie Chan take on the case. This is decidedly unfortunate for the guilty party, because Chan has the culprit well in-hand before the ship makes its final stOut of Print in San Francisco.