描述
：A lawyer who has been sentenced to jail becomes successful in business after serving time. A cop with a flourishing career solves case after case. The two people who are on opposite sides of the law are forced to join hands.
Chi Zhen (Zhai Tianlin) uses his wits and courage to outsmart the rich and power, making him a thorn in the side of the police force and earning him notoriety in other circles. Meanwhile, model student Lu Li (Yin Zheng) graduates from police academy at the top of his class and commences his dream career in the police force. After cracking a series of tough cases, he is promoted to chief of police within just a few years. Four years on, Chi Zhen and Lu Li’s paths fatefully cross. Though polar opposites to begin with, the ex-convict and chief of police put their differences behind them and come to trust and rely on each other.
分集簡介
：壹家青年旅社發生了命案，死者娜帕的床鋪上沒有掙紮的痕跡，經檢測是氰化物中毒。眾人將矛頭放到了前壹夜與娜帕共處壹室的關之源身上，可關之源壹口咬定自己是被冤枉的。陸離帶隊來到現場，聽取眾人的口供。在入住青旅的人中有來樺城找男朋友的馮婷婷、來投奔表哥的民工韋強、私自逃出學校的徐亮、因為手機沒電無奈入住的商務精英劉遠、因為與未婚妻吵架而獨自旅行的關之源、背包客何心雨、被開除的留學生程飛、獨自旅行的娜帕。經過壹夜審訊，案件並無任何進展，就在調查時間馬上就要結束釋放眾人的時候，之前嫌疑最大的關之源被人殺死在了公用洗漱間裏……
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