The Sol Chronicles; A HP Next-Gen

Sol Marks' great-grandmother, Ginny Potter has just died. The two were very close and this event leaves Sol an emotional wreck.
Now living with her 3 best friends from Hogwart's, Sol inherits most of her great grandmother's seemingly useless junk. But when going through an ancient dresser, Sol's best friend, Issy, finds a tiny watch. But when she touches it, she gets transported back in time, for only 5 minutes.
The four best friends have to figure out what Ginny has left for them and help solve a puzzle that was created generations ago...