Pulmonary sequestration (PS) also called accessory lung is a rare congenital malformation characterized by an abnormal mass of dysplastic lung tissue supplied by an anomalous systemic artery and it is separated from normal bronchopulmonary tree. Its incidence is around 0.1%. All cases occur sporadically It is uncommonly diagnosed in adults. It can manifest with variable presentations ranging from being asymptomatic to hemoptysis and recurrent pneumonia. Diagnosis is confirmed with computed tomography angiogram or angiography. Treatment is embolization of the afferent artery and surgical removal of the pulmonary sequestration. We report a case of a 55 -year-old female who presented with complaint of fever, cough breathlessness, since 1 year and was eventually diagnosed with pulmonary sequestration.