Kakashi Hatake, the Hokage, receives an invitation to Naruto Uzumaki and Hinata Hyūga's wedding. Kakashi has every intention to attend and he wants everyone else who was invited to be able to go as well. However, because Naruto and Hinata's friends have all risen to positions of importance within Konoha, all have vital and overlapping missions that they must be available for. Although Kakashi can in theory rearrange mission schedules in such a way as to make everyone available on the wedding day, he can't account for unforeseen circumstances that may prevent individuals from returning in time. He contemplates making the wedding itself a mission so that everyone can be "assigned" to it without problems, but worries that would be an abuse of his authority.
Kakashi assigns all the wedding's attendees a mission that is to be kept secret from Naruto and Hinata: bring a gift. Rock Lee takes the mission seriously, determined to get the best possible gift for Naruto. He runs laps around Konoha until he can think of what to buy. 864 laps later, Lee collapses from exhaustion; the best idea he came up with was a pair of dumbbells, which he doesn't think would be appropriate. Lee has a dream of Neji Hyūga while he sleeps. Neji starts giving him advice for the wedding present, but only manages to make unclear references to strength and stamina before Lee wakes up.
As Lee lies in the middle of a street he is greeted by Might Guy. Guy is about to do laps around Konoha until he can think of what to buy for Naruto and Hinata and invites Lee to join him. Lee reports that he's already done that without success. Guy suggests that Lee try coming up with a gift for Hinata instead, while he thinks of a gift for Naruto. Lee thinks about Hinata's post-wedding life of childcare and housework. Guy thinks of Naruto's post-wedding life of home maintenance and carrying groceries. Both simultaneously conclude they should buy dumbbells to prepare Naruto and Hinata for their lives ahead. Neji's words suddenly make sense to Lee and he embraces Guy in a long, tearful hug.
Later, Kakashi receives complaints about men with large eyebrows crying loudly early in the morning.