The fracture in the once-close relationship between Kanye West and JAY-Z continues to grow, and now, a new documentary is going inside the “bitter rivalry.”

UK’s Channel 4 has released the trailer for Public Enemies: Jay-Z vs Kanye, a special that will feature “unseen footage” and “unheard testimonies” about the rappers’ tumultuous partnership.

When West began his transition from producer to rapper in the early 2000s, JAY-Z became his mentor and a big brother figure. The duo even joined forces for their 2011 collaborative album Watch the Throne. But things have soured in the last year; in October, West went on a mid-concert rant about Jay, and on the opening song “Kill JAY Z” from his new album, 4:44, his former mentor fired back.

Public Enemies: Jay-Z vs Kanye will air Monday at 10 p.m. on Channel 4. Watch the trailer above.