The HBO Sports documentary about NTT INDYCAR SERIES champion and two-time Indianapolis 500 winner Dan Wheldon and his family, “The Lionheart,” will debut at 9 p.m. ET Tuesday, March 12 on HBO and will be available to stream on Max.

2005 and 2011 Indy 500 winner Wheldon suffered fatal injuries in October 2011 in a crash during the INDYCAR SERIES race at Las Vegas Motor Speedway.

SEE: "The Lionheart" Trailer

“The Lionheart,” which represents Wheldon’s nickname, blends archival footage with vérité storytelling to weave together two distinct narratives: Wheldon’s storied career in the past and the present lives of his widow, Susie, and sons, Sebastian and Oliver.

As Susie Wheldon grapples with her grief and the responsibility of raising their sons alone, the two boys, ages 12 and 10, take on their father’s mantle and enter the world of professional racing.

The film explores Susie Wheldon’s dilemma as a mother who questions whether her family’s lineage is a blessing or a burden while watching her sons, with the high-risk sport deeply embedded in their DNA, try to reconcile their father’s absence by embracing the very sport that took him from them.

Others featured in the film are Wheldon’s father, Clive Wheldon, INDYCAR SERIES drivers Dario Franchitti, Tony Kanaan and Scott Dixon, and team owners Bryan Herta, Michael Andretti and Chip Ganassi.

“The Lionheart” is a Time Studios Production and Stardust Frames Production in association with Words + Pictures and XTR. The film is directed by Laura Brownson.