Nancy Drew and the Ransom of the Seven Ships is a full-fledged adventure game. Lights, Camera, Curses is not. Instead, it is a logical evolution of the find the hidden object games that Big Fish seems to capitalize on. (One hidden object game, Ravenhearst, has already been covered on this site.)
However, Lights, Camera, Curses involves a bit more puzzle solving and actually includes many of the same voice actors used throughout the series. People who have played the other Her Interactive titles do not need to worry about it degenerating into a find-the-hidden object game with any plot or exposition.
Nancy Drew has been hired to be the production assistant for a remake of a film called Pharaoh. A number of mysterious accidents have occurred on the set. The producer, Arthur Hitchens has secretly hired you to see if you can find out who is causing the accidents and hopefully stop them.