C58 Someone is tailing us?

Riven’s POV:

“We already know that, Dad”, Caleb replied in a calm tone.

As a response to Caleb’s calm reply, came a loud shout from the other side.

“HOW?”

“That imposter has escaped, and Riven has already solved the theory for us. Someone also called Stefan. It is a whole mess”, Caleb replied in a frustrated voice.

“What? Who called Stefan?” Dad asked in an agitated tone