1950年6月15日，城里城外在成渝铁路开工典礼上，城里城外团长马祖堂把“开路先锋”旗帜交给先锋连连长罗向前。罗向前带着战士们修筑路基，他探索分层填土打夯法，解决了路基稳固性不足的问题。1950年秋，朝鲜战争爆发，志愿军入朝作战，罗向前被留下，他带着民工大队修建最大桥梁沱江大桥，不料遭遇特务破坏，牺牲了很多民工。罗向前发誓一定要修好成渝铁路，告慰牺牲工友。在柏树坳隧道路段，他和技术员叶岚带着民工们正干着，忽然发生塌方，很多民工被埋，罗向前被停职。经调查，塌陷属于地质灾害，罗向前恢复职务，民工们加班苦干，隧道很快贯通。1952年7月1日，成渝铁路全线通车。罗向前和叶岚在车厢里举行别开生面的婚礼。
回复 :朱承开（温兆伦 饰）与王一正（吴启华 饰）是相识多年的同事兼好友，个性和脾气迥然不同的两人曾经联手破获过不少的难解奇案。朱承开后因为性格火爆与同事产生龃龉辞去了警察的职位，转而成为了保安公司的调查科经理。事业上颇为不顺的朱承开在感情上也经历了滑铁卢，他和女友林茜（宣萱 饰）之间一直分分合合没有定数。与此同时，朱承开的前女友宋洛文（莫可欣 饰）亦出现在了朱承开的面前，本以为能够和宋洛文重修旧好的朱承开在经历了种种意外事件之后才发现，在宋洛文的背后，隐藏了许多的秘密，而他和林茜亦被卷入了危险的凶杀案之中难以自拔。
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回复 :Two high level scuba-divers and long-time friends, Don and Dave, broke a world record for depth in the Boesmansgat cave in South Africa. It would take them 15 minutes to reach the bottom, but 12 hours to surface. Having reached the bottom, against all odds, they find a body. They decide to come back and retrieve it. They call the parents, enrol 8 fellow divers, and hire a cameraman to document the dive. The camera will follow them throughout the preparation and the dive, including to the bottom of the cave. Little did they know that on that historic dive, Dave would not be coming back. In this time of over-performance driven by self-promotion and self-filming comes Boesmansgat, a story of loss and mourning where egoism and altruism, hubris and self-control, risk-taking and spirituality all go hand in hand. A cascade of choices and tense paradoxes that lead to a tragedy long foreseen, yet impossible to prevent. Written by AADP