The Shard of Tesla that caused the train incident is said to contain the notes for the Tesla Coil, and could trigger similar high-damage incidents in the vicinity. Botan and Kuruma act to recover the shard and prevent that, but are watched by another duo.
They're smaller than I imagined--
--إنها أصغر مما توقعت
Sind kleiner als ich sie
mir vorgestellt hatte,
Son más pequeñas de lo que imaginaba,
Je les imaginais plus gros,
São menores do que imaginei...