Freewill:
Re: A naive teen and her more-experienced partner witness a murder half-way through a remote rock-climb, and find themselves the target of the killer trying to cover his tracks
I have no particular problem with this version in terms of the issue of unity and singularity of plot.
I do have a question about the logline seeming to cast dual protagonists.? Who owns the story?? Who is your point of view character?? Who has the strongest arc?? Is the plot really about the relationship between the teen and the experienced climber?? Or...?
(FWIW: I favor framing the logline with the teen as the protagonist, the pov character, because then the film is more marketable: it can be promoted targeting the teenage/young adult demographic -- the most desired and lucrative group.)
I am aware of but haven't (yet) seen "The River Wild".? Reading the plot summary at IMDB, it seems that Meryl Streep's character is the protagonist because she's the experienced guide, the one with the skill and knowledge to steer the raft.? And I'm guessing she's the point of view character.
That is my provisional answer.? I've added it to my viewing queue.?? As is my practice, after I viewing a picture, I? will write my version of a logline? for it.