Be Careful, They Are Not Human

Puppet + no super powers + wits + military + terror + survival, multi-line narrative. South China Sea mirage. The weather station lost contact for 47 hours. A six-person reconnaissance team landed on the island to confirm. They found an empty building, a wall covered with flesh, and a warning written with a finger dipped in blood—— "Be careful." Not an enemy. Not a beast. It was something that looked exactly like them, but was definitely not human. What you have to do is be careful not to be replaced by them