The Paradox

A scientist from DARPA must pursue a colleague back in time to 1968 Vietnam, in order to stop him from altering history and  prevent the murder of her father.
The story is about a DARPA scientist, Jennifer Stanley who, after burying the ashes of her estranged father, learns that a colleague named Quan has hijacked her time machine, and gone back to 1968 Vietnam in order to prevent the death of his father.
 
She follows in an effort to stop him from altering history, and soon meets her father as a young soldier. Jennifer discovers that Quan’s plan involves the killing of her father and disrupts the plan, but gets captured by Quan before she can return to the present day.