As a synopsis is not required on such a splendid tense action film set in the murderous fields of the somme, story similar to Gallipoli where instead of Mel Gibson runner messenger segment in the end of the movie trying to relay orders of cancellation of advance push into a slaughter. 1917 entirety focuses on getting this letter order message to halt the advance of 1600 men to their deaths by next day, couriering by two lance corporals and one of them has a brother in one of the battalions!

One of the main characters running across the field during battle towards the end has the worst CGI as you can see no shadows under his feet as he dashes in front of charging men!