During a long hot summer in the 1970s, four boys roam free through a neglected rural paradise, until a tragedy strikes that sets them against the adult world and changes their lives forever.

A film poem to commemorate the 50th anniversary of the Aberfan disaster, written by Owen Sheers and performed by a stellar cast of Wales's best-known acting talent, including Michael Sheen, Jonathan Pryce, Sian Phillips, Eve Myles and Iwan Rheon, with some contributions from the local community.