29岁的自由职业者生田博人，无固定工作、无恋人，连常人该有的未来焦虑也全然不觉，是个乐天自由派。仅凭善良人品，他从交好的邻居奶奶和田花惠手中继承一栋单层平房，并与18岁的山形县表妹小林夏美展开同居生活。随着生活困顿的“烦恼者”们逐渐聚集到他身边……

Humanity finally rids themselves of Godzilla, imprisoning him in an icy tomb in the South Pole. All is peaceful until various monsters emerge to lay waste to Earth's cities. Overwhelmed, humanity is seemingly saved by a race of benevolent aliens known as Xiliens. But not all is what it seems with these bizarre visitors. If humanity wishes to survive, they must reluctantly resurrect their most hated enemy, Godzilla.