Synopsis

Returning home, the Harts were met with a scene of devastation. Their house had been thoroughly ransacked. As they began the arduous task of cleaning up the mess, they stumbled upon a concealed hallway leading to a vault. Before they could fully comprehend their discovery, the perpetrators returned, intent on retrieving the municipal bonds secreted within. The Harts and their friend Ida found themselves trapped inside the vault as the heavy door slammed shut, sealing them within.