"There is a secret tunnel beneath room no.4 for bodyguards. It ends up in the backyard of that grandpa's mansion. After that it's your decision on how you tackle the guards and kill grandpa. But I had a suggestion for that as well." The old man replied.
"And what suggestion is it? Let me hear it." Markus replied.
"Fortunately the window to the living room faces the backyard. If you manage to get inside, there is a main switch present in the room adjacent to it. You can turn it off for a while to distract the guards and then carry on with the plan." The old man said.
"How do you know about this all?" Markus asked.
"I am not the only one who has suffered all this. There are many, losing their near and dear ones daily in this hell. It was their sacrifices until now that I have gathered all this information." The old man replied, his voice heavy, as if remembering the ones he had lost.
"Hmm. Thank you for the information." Markus said.