The Last Man (2018)

"Are you ready to survive?"

Tov Matheson is a war veteran with PTSD who perceives that the apocalypse is coming. After starting a relationship with a dubious Messiah, he leaves his normal life and begins the construction of a shelter underground, training himself, in an extreme way, at the cost of losing everything and making people believe he is insane. When he also believes it, something extraordinary happens.