Complex sentence: Will and his wife Arden wonder about Joey's death while two of Will's crew, Danny and Drew, are secretly planning to go to a nearby island with their girlfriends Carly, Will's daughter, and Erin.
Split into simpler sentences: Will and his wife Arden wonder about Joey's death. Two of Will's crew, Danny and Drew, are secretly planning to go to a nearby island with their girlfriends Carly, Will's daughter, and Erin.