Complex sentence: It again starred her sister Joan Collins-reprising her role as Fontaine Khaled, the owner of a trendy disco now facing financial problems whilst having to deal with the men in her life as well as the Mafia.
Split into simpler sentences: It again starred her sister, Joan Collins, reprising her role as Fontaine Khaled. At the same time, she also has to deal with the various men in her life as well as the Mafia.