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.
If he left an hour ago,
there's a high probability
إذا كان قد غادر منذ نصف ساعة  
فهناك احتمال كبير
S’il est parti il y a une heure,