The challenge may be to face off against some level of hell, but its up to the writer how they overcome it: a gallant act by a crewmate, the love of a family member, etc.
The theme may be dark, but there is there is always hope. As a certain Bajoran Major once said, "a light only shines in the darkness".
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)