此“火星”非彼火星,实为重金属乐队Metallica的创始人超火明星Lars Ulrich。Tom患有先天性智能障碍,是Lars的超级粉丝。于是Tom的家人Kate和Will决定带他去见自己的偶像。带着这个任务,他们行动了。Kate and Will Spicer's brother, Tom, has Fragile X Syndrome, the most common form of inherited learning disability. He is also a massive fan of Lars Ulrich from Metallica. They made a promise to Tom that they would get him to meet Lars. Tom's dream is their promise. Together they went on a Mission to Lars.