An immersive, gritty docu-series that dives into the worlds of fighters across the globe, joining them as they train and prepare for the fights in which the stakes are high, and the dangers are real.

“Why We Fight,” a documentary series executive produced by UFC champion Ronda Rousey about a talented but troubled young boxer, is set to premiere on Verizon’s Go90 free video service later this month.

The series follows Zac “Kid Yamaka” Wohlman on his pilgrimage across the globe, where he encounters fellow fighters with their own issues and reasons for stepping into the ring. “Why We Fight,” comprising eight 45-minute episodes will premiere Oct. 18 on Go90.

The series was inspired by the short film “Kid Yamaka” directed by Matt Ogens. It’s produced by Dirty Robber and Religion of Sports, the sports-media firm founded by Gotham Chopra, Michael Strahan, Tom Brady. “Why We Fight” is distributed on Complex Networks’ digital channel on Go90.