Chinatown, San Francisco, 1928. Former private detective Dashiell Hammett, a compulsive drinker with tuberculosis who writes pulp fiction for a living, receives an unexpected visit from an old friend asking for help.
When fate brings Belfast teacher JJ into the orbit of self-confessed “low life scum” Naoise and Liam Óg, the needle drops on a hip-hop act like no other. Rapping in their native Irish, they lead a movement to save their mother tongue.