Amna is a young woman that witnesses the death of her older sister by her uncle, who had abandoned her family and left them with no support. She understands from her mother that her sister deserves to die because she dishonors the family. Amna doesn't agree. She believes that her uncle should be blamed for their conditions. She seeks revenge from the engineer who swayed her sister and lied to her thus causing her death. Amna moves to his house to work as a maid and tries to poison him several times, but all her plans fail. She discovers it's impossible to kill him. This engineer starts to approach her, but she resists him, which makes him even more attracted to her.