The Nun's Priest's Tale is one of the most famous stories in The Canterbury Tales. The story is based on a popular medieval fable in which a fox catches a rooster by tricking him to sing with his eyes closed. Thereafter the rooster tricks the fox to speak so that he can fly away. The Nun’s Priest expands the allegory with a more complex setting and the main character - Chauntecleer’s dream complicates the morals of the tale. Previous scholarship has discussed the wide variety of morals, but one moral is agreed by many of the scholars, which is do not trust in flattery. On close reading, there are lies exist in the story. Lies that are uninvolved with flattery and one flatterer gets what he wants. Therefore it is not accurate for this moral to be narrowed down to only cover flattery. Constance B. Hieatt divides morals in The Nun’s Priest’s Tale into three groups (Hieatt 4). For the first group, her idea is coherent with other scholars which is “warn[s] against trust in flattery” (Hieatt 4). The second group relates to free will and divine foreknowledge. The final group suggests that Eve is the cause of the fallen. The moral in the first group is taken for granted as the Nun’s Priest concludes it in the tale. But that’s where details were missed and I want to argue on this moral and extend it to be “warning against trust in anyone.” as an underlying moral. I will discuss this from two perspectives. First, not all flatteries have bad consequences. Second, the story teller is an unreliable narrator which means not only the flatterers should not be trusted. With reference to flattery, most readers focus on the scene between the fox and the rooster. Actually there is another instance of flattery that precedes this. After the debate on his dream with Pertelote, Chauntecleer flatters Pertelote for more than 10 lines of verses. If the moral of “warning against trust in flattery” stands correct, Chauntecleer should end u