Marco (Mario Casas) is a young businessman who manages one of the most successful technological companies in the world, ALVA, which has just launched its latest prototype into the market - CYCLONE, an electric car propelled by turbines that turn wind into energy. His friend and classmate Diego works with him, along with the latter's wife, Bárbara, the efficient marketing manager of the company. Eva, a young, ambitious engineer who has a lot to hide, also joins the team, and she will disrupt the balance at work, both emotionally and professionally, between the two business partners. In spite of being a popular guy, Marco, unlike Diego, doesn't have an exciting social life. He is a solitary man, and no one has access to the intimacy of his soul, apart from his psychologist, SARA, on whom he is emotionally dependent. Marco is haunted by a huge number of ghosts from his past and, although he tries hard to scare them away, he only finds comfort in sport and in frequenting a private club. People go there just to get pleasure and give free reign to their wildest erotic fantasies, without fear of falling in love, as everyone has to wear a mask to hide their faces. But everything changes when Marco meets Carol, the new educational psychologist who looks after his brother José, an 18-year-old boy with problems of autism, with whom he has a difficult relationship. With her, he will also meet his worst enemy - himself. Thanks to her, he will discover that it is never too late to love, even if it brings some pain along with it.
木讷的许三多（王宝强）没进军营，就因看见坦克时“举手投降”招来以“不抛弃、不放弃”精神闻名全团的“钢七连”连长高城（张国强）的反感，入营后，班长史今（张译）成为他的依靠，副班长也是老乡的伍六一（邢家栋）却因他的笨拙将其视为肉中刺。新兵训练结束后，许三多被分到偏远艰苦的后 勤管道维护班五班，一同来部队的老乡成才（陈思成）则去了钢七连。 被现实打垮的五班班长老马（范雷）随随便便的一句话被许三多当作命令接收，凭借憨厚的执拗劲，他用六个月时间完成了一件所有人都认为不可能完成的任务，令五班整体感动，精神面貌焕然一新，自己也因此来到钢七连，重见班长史今。喜悦过后，一个个看似不可能跨过去的槛在他脚下一字排开。而在这一过程中，他从史今、伍六一、高城、老A袁朗（段奕宏）及吴哲（李晨）等人身上学到了很多很多，从一个“孬兵”变成了一个“好兵”。
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「围绕四位年轻人之间可爱的关系，将触动整个暹罗广场的心」的可爱噱头氛围引入现时发生的流行文化，美甲已不仅仅是普通的绘画，它可以创建无限的图案，并成为青少年表达不受性別限制的领域之一。 剧情讲述关于爱和人际关系的故事，也包含了关于成长、学习促使四位角色的改变。 高中生Fourmod经常受到Gel Nail Boy Chian的邀请，以在暹罗广场（Siam Square）完成指甲，这使Fourmod跌倒了。但是，他后来意识到，当他发现Chian还邀请Luk Khrueng Tiktoker Bua将指甲一起完成时，他将被保留下来。为了使chian嫉妒，Fourmod决定使用他的密友Babin做同样的事情。
