在20世纪70年代的漫长炎热的夏天，四个男孩在一个被忽视的乡村天堂中自由漫步，直到一场悲剧袭击使他们对抗成人世界并永远改变他们的生活。

Eve Myles returns as Faith Howells as she attempts to navigate the fall out of her marriage break-up, while taking on an emotionally wrenching legal medical case involving a gravely ill little boy.
　　Bradley Freegard as Evan Howells and Mark Lewis Jones as Steve Baldini are joined by Olivier award-winning Celia Imrie (Victoria Wood: As Seen On TV, Dinnerladies, Best Exotic Marigold Hotel) for this third series.
　　Matthew Aubrey (Made in Dagenham, The Gospel Of Us), Bafta Award-winning actress Dame Sian Phillips, and presenter and actor Shaun Fletcher have also joined the cast.
　　Keeping Faith was originally developed by S4C as Un Bore Mercher. Produced for BBC Wales and S4C by Vox Pictures, in association with APC and Nevision. Directed by Pip Broughton and Judith Dine, written by Matthew Hall and Pip Broughton, and produced by Pip Broughton and Llyr Morus.