In "Shoot 'Em Up," Mr. Smith finds himself in an unexpected situation when he assists a woman in giving birth amidst a chaotic gunfight. After the baby's arrival, he becomes the reluctant guardian of the infant, facing relentless attacks from a horde of armed assailants intent on capturing the child. With his sharpshooting skills and determination, Mr. Smith must navigate through a barrage of bullets to ensure the safety of the newborn while unraveling the dark forces pursuing them.