In the summer of 1979, during Taiwan’s martial law period, Bing-Kuan asks her college friend Shu-Lan to help out on her family’s banana plantation. As time goes by, the two girls secretly develop a romantic relationship, and decide to volunteer at the Formosa Magazine in order to promote democratic freedom of expression. Yet their youthful romance is threatened as the Kuomintang regime seeks to suppress dissident voices.

故事要從1979年的暑假說起，孟娟(陳妤 飾)邀請大學同學書蘭(劉倩妏 飾)到家中的香蕉園幫忙。兩人偷偷發展出一段曖昧的情誼，還結伴到『美麗島雜誌社』為自由發聲，眼看彼此找到心之所向，然而在遭遇白色恐怖的監控下，該如何藏得住這份不能說的秘密？

剧中叙述1979年的暑假，女主角孟娟邀请大学同学书兰到家中的香蕉园帮忙采收。两人偷偷发展出一段暧昧的情谊，还结伴到美丽岛杂志社为自由人权发声，眼看彼此找到心之所向，却浑然不觉踏入白色恐怖的风暴中。