The Baby Face Nelson Story follows the life of Lester Joseph Gillis, better known as Baby Face Nelson, a notorious American bank robber and gangster during the Great Depression. Born in 1908, he became infamous for his violent crimes and association with the John Dillinger gang. Nelson was known for his youthful appearance, which earned him the nickname "Baby Face." Nelson's criminal career escalated in the 1930s, leading to numerous bank heists and shootouts with law enforcement. He was involved in several high-profile crimes, including the murder of a police officer. His life ended in a shootout with the FBI in 1934, marking the end of his violent spree.