After David Kim's 16-year-old daughter goes missing, a local investigation is opened and a detective is assigned to the case. But 37 hours later and without a single lead, David decides to search the one place no one has looked yet, where all secrets are kept today: his daughter's laptop.

午夜过后，一场大雪迫使东方快车停了下来。这辆豪华列车整年都处于满员状态。但那天早上却发现少了一名乘客。一个美国人死在了他的包厢里，他被刺了十二刀，可他包厢的门却是反锁着的。 随着紧张气氛逐渐增强，侦探赫尔克里·波洛想出了两个侦破此案的方法……