Natsu wakes up to find herself thrown out in the middle of an ocean. The last thing she remembers is going to sleep in her own bed. She finds she's with 7 strangers, and none of them remembers boarding a plane or a ship. The group gets stranded on an island full of strange plants and creatures. There, the "guide" explains to them about 7SEEDS, a government project to ensure humanity's survival, set into motion when scientists around the world predicted the destruction of earth. In Japan, 5 groups of 7 people, plus a guide for each group were put into cold sleep, only to be released when the climate is suitable for their survival. But when Natsu's group is confronted with the proof that they are indeed in Japan after some kind of catastrophe, each have to deal with the fact that life as they know it is over. No help is coming. They have to survive on their own on this land, where the environment has seemingly turned back to Jurassic times. (AnimeNewsNetwork)

Vol 1:最後的記憶是吃飽了飯，在自己房間的小夏⋯⋯怎麼也想不到，一覺醒來，竟然身處狂風大雨的海洋之中。遭海浪吞沒前，三人好不容易攀上的小船，上面竟有各人的行囊！沒有一個人知道到底是怎麼一回事！最後一行人漂流到了無人島。為了生存，嚴酷的競爭開始

Vol 2: 小夏四個人所到的無人島，是他們想像不到的殘酷世界。襲擊他們的猙獰的動植物，可怕的白骨⋯。他們不知道為什麼來此，只能懷著不安和疑惑開始叢林冒險的生活。帶著一線希望，攀上高點所看到的，卻是令人絕望的景色

Vol 3: 巨大隕石衝撞地球──！包含人類，地上的生物遭受了絕滅的打擊。� �測狀況的政府機要、展開了「七種子計劃」。被選上的年輕人、經冷凍保存，放進未來世界。面對難以接受的事實，他們所發現的東西是「光明」、還是「黑暗」? v4: 唯一能確定的只有這裡是過去的日本，以及除了自己之外，其他生物都已死絕。� �測出如此悽慘的近未來，政府想出了「七種子」計劃。雀展中選的年輕人們展開行動！克服一個個絕境與困境之後，終於發現希望之光?

Vol 5:所謂的「七種子」是指為了� �防地球上的生命瀕臨滅種的時候，所選出來的年輕人的總稱。從冷凍睡� 中醒來的他們，邊和難以置信的現實對抗，邊朝放有救援物資的七座富士的目標前進。錯身而過的他們對於發現生存者的痕跡，一則以喜一則以憂，這樣的心情持續沒多久，就又得面對新發生的問題

Vol 6: 有人前去尋找自己的故鄉、有人急於尋找自己的愛人、有人則是在某處紮� �。在不同想法交錯當中，等待著他們的是希望之光呢？還是惡夢的陰影呢？