The Revenge Plan

Zane Dawson, a 17 year old girl who goes scuba diving with her father and his team.
on this adventure to an underwater base their submarine has an "accident". They still don't know what caused it and they're trying to find out.
When Zane's father dies in the underwater base of an unknown cause, she breaks down and locks herself in a room. Several people have tried to get through to her but she won't let them.
What will she do when she finds out that her father didn't die but was murdered by one of his crew? Will she seek revenge? Or will she try to get back up to the surface to escape the killer's grasp?
What Zane doesn't know is that there are unknown aquatic species that are angry at their arrival and will do anything in their power to force them back up to the surface or to kill them all. Zane however finds out about the unknown species and forces herself to stay in the base, with the killer...