Kartagener's syndrome or primary ciliary dyskinesia (PCD) is a very rare congenital malformation comprising of a classic triad of sinusitis, situs inversus, and bronchiectasis. PCD is a genetic disorder with manifestations present from early life, and this distinguishes it from acquired mucociliary disorders. Approximately one half of patients with PCD have situs inversus. We present a case of 12-year-old girl with sinusitis, situs inversus, and bronchiectasis. The correct diagnosis of this rare congenital autosomal recessive disorder in early life is important for the overall prognosis of the syndrome, as many of the complications can be prevented if timely management is instituted.