We often read in novels how a seemingly respectable person or family has some terrible secret which has been concealed from strangers for years.

我们经常在故事里看到，有些人或者家庭虽然看起来很正直，但其实有一个可怕的秘密，这个秘密已经隐藏了很久，甚至连陌生人都不知。