Ver en Cuevana. Chien Yu and Chih Pang are best friends, but they face challenges when Chih Pang unexpectedly vanishes on his 16th birthday. Upon Chih Pang’s return, Chien Yu discovers he’s the only one who can see him. Amid these unusual circumstances, the two seize the opportunity to reveal the secrets they’ve been keeping in their hearts, embarking on a journey of self-discovery.