Mission name: Trouble in Kirigakure.
Allowed rank(s): Any, though Genin and Chuunin require a B-rank or A-rank squad leader.
Objective: Help Kiri.
Storyline: Seven Bells.
Location: Mizu no Kuni border.
Reward: 250 Ryo + Once you arrive in Kiri, a lot of missions will be available to take to help in the defense of the village.
Mission description: Travel to Kirigakure and meet with the allied forces on the front lines. From there you will have access to all the missions pertaining to the Seven Bells plot line.
Mission details: You can expect to be accosted by missing-nin when you arrive at the border. You may or may not encounter ones aligned with the Seven Bells clan, or just independent missing-nin using the siege as an opportunity to make a profit or a name for themselves.