An innocent engagement, separated by life and death for ten years. The grandest reunion is destined to have the most empty echo.
The "ten-year engagement" under the sycamore tree when he was young was the only light in Qin Mengxi's dark youth. However, the shadow of campus bullying dragged her into the abyss. In despair, she only left her brother Qin Zhining with one last word: "Don't let Linlin know... I am no longer here...". Qin Zhining carries this bone-gnawing secret and pain alone.
Ten years later, the agreed date.
Lin Lin carried the most passionate longing for a girl and dressed up for the appointment, with only the joy of meeting again after a long separation in her eyes.
Lin Jinghao was eager to protect his sister. After a shocking car accident on his way home, he smelled a conspiracy and vowed to find out who was behind the scenes.
Qin Zhining stood under the plane tree like a ghost, waiting for the judgment to come.
"Where is Mengmeng?" Lin Lin asked innocently, which was the last straw that broke everything. When Qin Zhining struggled to say "she is gone", the innocent world was instantly shattered. The missing truth, the buried cruel past, and the murder suspicion pointing to the old enemy exploded in this promised "empty" place.
They must face the deafening echo of heartbreak, peel away the layers of fog in the torrent of grief, pursue belated justice, and learn to carry the weight of memory in the eternal absence of their lover, looking for a glimmer of survival.