Former police negotiator Shen Yan was diagnosed with a terminal illness and only had ninety days left. During one night shift, he received an untraceable phone call. If the caller takes the initiative to tell the true secret, he will gain lifespan; the more dangerous the secret, the longer he will live. But if it is leaked in advance, the life span will be doubled.
Some concealed betrayal, some foretold murder, and some knew the truth about what killed his parents fifteen years ago.
In order to survive, Shen Yan must keep their secrets secret. But when silence begins to take the lives of innocent people, he has to choose: keep other people's secrets, or trade the rest of his life for the truth.