From the D.E.E.P. - June Whatley - Bog

What do three teenagers, a secret underground base and a kidnapped engineer have in common?
As if a flu pandemic weren't enough to deal with, fifteen-year-old Ashton, sixteen-year-old Mican, and thirteen-year-old Shayla are forced to move when their mother learns the family might be in danger because of their father's former work, but after they move into a lovely new home, Ashton is tormented at night by a strange sound coming from under his floor.
In an attempt to find the source of the noise, the siblings stumble upon a secret underground base and a man being held hostage.
Do they attempt to rescue him or do they hesitate and risk the man being executed? They have one hour to decide.