Tokyo, Rotterdam, Boston, London. The spring marathon season never fails to deliver, and this year was no exception. Some called it the greatest collection of marathon fields in history. The NN Running Team showed up at every start line, ready to leave their mark. This documentary takes you inside the action, offering a unique behind-the-scenes look at the performances of Eliud Kipchoge, Joshua Cheptegei, Yalemzerf Yehualaw, Geoffrey Kamworor, and Abdi Nageeye. Credits for the footage: @tokyomarathonfoundation2650 @nossport (NN Marathon Rotterdam) Boston Athletics Association (Boston Marathon) @LondonMarathonEvents