In London's least shiny neighbourhood - Silvertown a young man is killed for being a grass, but his reasons and convictions sink with him into the dirty waters of the Thames. His brother Leo, shattered by the death, struggles to understand why his friend Isaiah is apparently guilty of the murder.

While his half-sister starts an unwitting relationship with the real killer and his mother sinks deeper into grief, it is left to seventeen-year-old Leo to resist revenge, take the necessary action and uncover the shocking and ugly truth.

HUSH YOUR MOUTH delves into the murky world of drowned-informers, sexually exploited teens and a bereaved brother Leo who is divorced from any spiritual compass by which to steer himself and his family through death and loss. Tyrwhitt is keen for the film to be an honest reflection of the part of London he grew up in and as the films hero Leo says You want to see me put a bullet in someones brain avenge my brothers killer? You're going to be disappointed - in fact, piss-off and tell your own story; this ones spoken for!