As Rena and Maki focus on recuperating from their injuries, the other members of SORD head on a school trip overseas. However, their arrival swiftly pulls the Mihama crew into a quest to locate a missing SORD member. Schoolmates Sylvia and Velvet, from St. Aile's International School, come forth to offer their support. Tohka is at the forefront but is wrestling with personal conflicts stemming from her history and a promise she failed to keep to a friend.