From the BBC website:
Maurice Riley and Syd Woolsey are old friends who return from the good life on the Costa del Crime to a quiet Devon fishing village. They plan to eke out their retirement fishing and availing themselves of the NHS. However, the quiet life is not for them. As their ill-gotten gains run short, they find themselves drawn back into a life of crime, only crime has moved on and they've got new things to learn.It starts on 1 May at 9pm on BBC1. Watch a trailer and read cast interviews at The Invisibles website.