The first thing I struggled with and picky I know, was Jonathan with his original girlfriend taking selfies with his SLR "Film" camera, (no ability to check the shot) so how an inexperienced photographer can manage to shoot a photo at arms length with a camera, get it in focus and their heads in the frame I don't know, so I questioned the time line only to discover this was meant to be 20 odd years prior, the fact hand held selfies only became a "thing" with the advancement of cameras in mobile phones seems to have been missed by all those involved with the shooting and production of this film. I let go of that and watched what at times was an engaging series but how the Mother of Jonathan pieced together the story of the two of them and what happened on the beach that day to write the book was not plausible and ending just left you hanging, but I guess so were their lives too.
Great actors, pity the script wasn't as tight as it needed to be.