Bringing Back Faith

Faith has survived a harrowing life that leaves her with lasting damage to her mind and body. She finds herself injured and sitting on a beach, wondering how she got there. Faith has amnesia from a large bleeding headwound.
Sam is an elite combat search and rescue medic in the Navy. He has dedicated his life to serving his country when a sniper's bullet changes everything. Sam takes a walk along the beach one night after a disappointing future career talk with his CO. He finds Faith near the waterline in a bloodied state and saves her life.

Together, they learn how to carry on living after their traumas but as their physical injuries start to fade, they discover something else. Someone is still trying to kill Faith.
Sam and Faith escape the West coast and go into hiding, As they are running for their lives they cannot help but wonder.
Who is trying to kill Faith and why?