Captured and imprisoned by the government, Liu Yao-ting is forcefully separated from his wife Shih Yueh-hsia. During this time, they write to keep their love alive. Eighty one letters, lipstick-smudged and sweat-stained, are the vessel for their passion and the embodiment of their spirits.

Elementary school teacher Xuan-ying is paid a visit by Yue-jie, a student of hers from 12 years ago. During the three hours they spend together in the classroom, Xuan-ying slowly steps away from her former disaffection with the world and once again witnesses what it means to be alive.