The Thunder Store S1 Ep10

When a lightning strikes, the secretive owner of the thunder stationary store transforms into a young charming lady-stationary store girl-in the blink of an eye. This lady gives out special items to the quick-witted kid detectives and they run around to solve the problems that were thought to be paranormal using the equipment.

Ep10: Yebin is being attacked by Black Dabin, and is also being chased by a strange group wearing a black suit. The detectives find a letter which Yebin left, and finally the relationship between Dr. Kim and Yebin is being revealed.