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.
Aww, and things were going so
"nice and easy," too...
يا للأسف، كان كل شيء  
..."يمر بـ"سهولة ولطف
Och. Dabei war ich so schön artig.
Y las cosas iban a ser fáciles…
अरे यार, मुझे लगा था यह मामला
शांति से निपट जाएगा।
As coisas estavam
tão "simples e fáceis"...