share time: 2026-05-16 06:04:15
Su Xiao, a newly recruited radio intern, stumbles upon tapes of "Seven-Day Echo", a late-night radio show that went off air a decade ago. Every seventh day at dawn, the voice of her late sister Su Qing—who died in a car accident eight years ago—suddenly echoes from the old recordings. The faint distress signal left by her sister leads to a buried truth: Su Qing stood up to school bullies to protect Su Xiao, but was accidentally dragged into the disappearance of the show's host back then. With a seven-day countdown, Su Xiao must crack all mysteries before the seventh day to silence the eerie sound and finally uncover the truth for her sister.
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