特种兵退役的穆鹰回归都市生活，误打误撞结识了马来西亚富商之女程燕羽，也因此被卷入了一场商业斗争的漩涡，在一番激烈的碰撞后，穆鹰惊讶的发现对方幕后黑手竟是自己当年执行最后一次任务要抓捕的毒枭老大叶灵均。
程威是一个工作狂，由此使他的家庭生活慢慢失去了平衡。妻子林叶离家出走了，儿子叛逆，这让程威陷入生活绝境。他不想让儿子承担，便一个人开始了寻找林叶的下落。思远却知道了母亲离开的原因以及好友佳佳的死亡，给他沉重的打击，从此变得沉默寡言，自闭、抑郁。内蒙草原，这是程威曾经当兵的地方，他想在这里面对妻子和儿子，进行自我救赎。
Gyeong-ah works as a caregiver and lives alone. The only one she can rely on is her daughter, Yeon-su, but it's hard to see her after she moved out on her own. Meanwhile, Yeon-su, who is suffering from her ex-boyfriend, Sang-hyun, argues with him again and visits her mother’s house. After Yeon-su left, Gyeong-ah receives a shocking message from a stranger.
