Locked twins is a rare, hazardous obstetric complication. Herein, we report the rare condition of an unbooked case of locked twin that attended our labor room in late stage of labor with arrested afterâÂÂcoming head of the first twin, which was dead. Caesarean section was performed to save the second baby. Antenatal diagnosis of twin gestation with leading twin breech and second twin cephalic presentation raises index of suspicion of potential locked twin. Timely done caesarean delivery could have avoided the fetal death.