Clifton Hidden Room Radio

There's an old clue tucked inside my medical journal — before I left, I hid a communication radio in the secret room of Clifton's Ellie Shop. The radio still holds signal codes for a few of my old colleagues; it was the last lifeline I left behind. The key to Ellie's shop and a large backpack have been sent to your mailbox — get inside, find the hidden entrance, and bring the radio back.