When they were met, the crew of the Vigilant volunteered to help Morpheus assist the One to enter the Source. Their task was to disable a backup generator of the local nuclear plant.
Axel was with Jax on the console, when spotted approached Sentinels. Axel went to the rear to observe to see an incoming bomb thrown by the Sentinels. He went back to warn Jax but the catwalk fell on his way; he was killed by the fall and a spike impaled Jax.