在这部剧场版 天地无用!in LOVE剧情/喜剧/科幻/动画/奇幻片中,在遥远的太空中,有位对树雷王家怀恨在心的邪恶犯罪者‧祸因,从亚空间脱逃。在而把GP本部消灭,然后逃往过去年代地球去抹杀拥有树雷力量的人。 祸因因为乾涉了过去时空,要去袭击天地的母亲(阿知花)。在一个平静的时刻,天地一群人正在欣赏天,地母亲的录像带,突然间四周发生了异状,不但周遭的景物改变,天地也差点就消失,甚至连胶卷上的天地母亲亦消失了。幸好鹫羽利用科技暂时把天地保护,但天地只剩下些许的时间。为了拯救天地的母亲遭受毒手,即守护这重要的回忆,天地他们于是回溯到26年前,天地父母亲的青春时代岁月…。
本剧交待了天地在童年时为何失去母亲的一切。在过去时,天地找回了母亲的思念之爱,及母亲对孩儿的爱是如此伟大。
Tenchi and co. find their existence unsettled by a time-travelling entity called Kain. Desiring revenge upon the Juraian emperor, Tenchi, Kain travels back in time to kill Tenchi's mother. Trying to preserve the timestream, Tenchi and friends follow him back. Unfortunately, Tenchi must also deal with the pain that seeing his mother causes him. Since she died in the future, seeing her alive in the past reopens his old wounds.