The Secret Sharer (Unabridged‪)‬

In the late 19th century, a sea captain on his first voyage in the Gulf of Siam, on an unfamiliar ship, with a crew of strangers, takes aboard a fugitive stowaway. He must conceal his presence from the sailors with whom he shares this ship, and so he and the stowaway become conspirators. 

The young captain must challenge his own morality and the sworn obligations of a sea captain. He must decide who he wants to be as a man and as a moral actor in the arduous undertaking of endeavoring to deliver this fugitive to safety.