From the introduction: One Busy Night is a CAPERS adventure for 2nd-level gangster characters. It is set in Atlantic City, although it can be adapted to any other city with ease. ... The characters work for Nucky Johnson, the gangster boss of Atlantic City. Refer to the Atlantic City section of the CAPERS game for additional pertinent information on Nucky and A.C. The characters have each impressed Nucky in some way lately. As a reward, Nucky has given the group their own club – The Nightingale – to run.