说出愿望吧

Cheryl is an astrophysicist who reviews grant applications for the NSF but has regrets about the guy who got away five years earlier. When the Christmas carnival comes to town, a ride around the carousel takes her magically back in time - giving her a second chance at love before she returns to Christmas present.。外星人侵占了地球，人们被迫逃到地底下的巨型地堡避难。萨姆一号是一个忠诚的战士，他被送到地面上拯救幸存者。他的任务就是守卫人类的自我防御区不让外星人靠近，然而这每天的例行任务却逐渐成为他的噩梦，令人恐惧的声音在树林里回荡，基地每日都受到频繁的攻击，塔内的电力供应出现故障，修理工却迟迟不出现。他的上司也从未告诉过他有关上一任的事。孤独感与妄想症慢慢侵蚀了他的理智。难道外星人真的埋伏在森林里吗？还是萨姆一号已经被折磨到精神错乱？。