Sleep is for the Weak

Once upon a time, the Misfits had a fourth friend. Mole, they called him. He knew San Paro like he knew the back of his hand. Until one day he found a tunnel he had never seen before. Curious, he travels inside, getting himself lost and stuck. Now, it's up to the remaining three Misfits to find him. The question is: are they too late to save their beloved friend?