All You Need Is Kill

Rita Vrataski is a young soldier in the United Defense Force (UDF), a military unit which has been sent to approach and study Darol, an enormous extraterrestrial plant which landed on Earth one year prior and been dormant since then. On her first day, Darol suddenly sprouts monstrous vegetation which attacks the UDF soldiers. Rita is killed, but awakens again on the morning of that day, finding herself trapped in a time loop.