From the Publisher's web site:
Death on the Gambia is a dinner party murder mystery game for 8 to 10 guests and a host.
Join us in a thrilling evening of plotting, mystery and treachery. You will be in the middle of the action and it will be up to you to wheel and deal with the other guests. Can you achieve your goals, keep your secrets hidden and survive Death on the Gambia? It's up to you.
It is 1939 and across Europe countries are preparing for war. In the distant British colony of Gambia a smaller drama is about to unfold as the tramp riverboat Christabel starts a routine trip along the River Gambia...
Death on the Gambia lasts for about four hours and is suited to an evening. It is often played over a meal - a finger buffet if possible to allow guests to circulate and talk in private.