An unbeatable team of five teenage friends, the Peppercorns, unites to find out who is behind the kidnapping of a missing oceanographer who has discovered a means of getting rid of plastic waste in the ocean.
萝卡从小跟着太空人爸爸生活，让她的个性无比独立，更有着不同于一般人的思考方式。在爸爸的安排下，萝卡搬回城市和外婆同住。第一天上学，萝卡就对校园和街头看到的现象感到吃惊。活泼勇敢的她决定采取行动，证明即使是小孩也有能力带来改变。
