When the Water Turns Red

Luke was petrified of anything that had to do with heights.
When his worst fear comes true and his plane goes crashing towards the ocean, he finds himself stranded on a small island with twelve other people.
Of course their first intention is to survive as a group, but someone has other plans.
Once the first murder happens, things start to slowly fall apart. People are turning on one another, steeling supplies, and to make matters worse, the murders continue during the night.
Who is killing everyone and why?
Will anyone make it off the island?
Will anyone even survive?
All Luke wants is to get off this island, and go back to his old life. But lets face it- Once normal is gone, it's most likely never coming back.