A new trailer for "Black Mass" has landed online, giving a look at another side of Whitey Bulger (Johnny Depp), one of the most notorious gangsters in U.S. history. As a father, he gives his young son some life lessons, though it may not be the best advice for a six-year-old, AceShowbiz reports.

He shows his cruel side when it comes to business. He coldly shoots a guy multiple times and angrily strangles another man. Still, one of his elderly neighbors is glad to have him back in the neighborhood after he served time in prison.

Based on a true story, it is set in 1970s South Boston. FBI Agent John Connolly (Joel Edgerton) persuades Irish mobster James "Whitey" Bulger to collaborate with the FBI and eliminate a common enemy: the Italian mob. The drama tells the true story of this unholy alliance, which spiraled out of control, allowing Whitey to evade law enforcement, consolidate power, and become one of the most ruthless and powerful gangsters in Boston history.

The movie also stars Benedict Cumberbatch, Kevin Bacon, Dakota Johnson, Jesse Plemons, Peter Sarsgaard, Dakota Johnson and Corey Stoll among others. Directed and written by Scott Cooper, the crime thriller will open in theaters nationwide on September 18.