《面具之下》讲述了被别人出卖而不断逃亡的威廉为了挽回自己的名誉，决定与夏洛特和本·富兰克林合作。三个人与时间赛跑，化解一场可能给新生国家带来灾难性影响的阴谋，一个惊天大阴谋浮出水面

英国东印度公司的首席雇佣兵被自己的前雇主出卖，导致自己被迫逃亡美国的一片殖民地，他为了自己的名声，决心阻挠前雇主，即便面对自己过往经历的束缚，他依然选择无视，取得了夏洛特的信任和帮助，即便他曾经欺骗过夏洛特。这个自己深爱着的女人，依旧选择无条件相信威廉。在两人的合作之下，还获得了一名叫做富兰克林的知识分子的帮忙。这三个人决定组织威廉前雇主的阴谋，帮助一个新生国家免于灾难。电影将每个人的主人公的顽强斗争精神表现出来，鼓励人们敢于反抗。

"Under the Mask" tells the story of William, who was betrayed by others and kept fleeing, in order to save his reputation, he decided to cooperate with Charlotte and Ben Franklin . The three raced against time to resolve a conspiracy that could have disastrous effects on the new nation, and a terrifying conspiracy surfaced

The chief mercenary of the British East India Company was betrayed by his former employer, and he was forced to flee to a colony in the United States. His own reputation, determined to thwart his former employer, even in the face of the shackles of his past experience, he still chose to ignore it, and gained Charlotte's trust and help, even though he had cheated Charlotte. This woman whom I love deeply still chooses to trust William unconditionally. Under the cooperation of the two, they also got the help of an intellectual named Franklin. The three decided to organize the conspiracy of William's former employer and save a nascent country from catastrophe. The movie shows the tenacious fighting spirit of each protagonist and encourages people to dare to resist.