Dr. Pete has lost his favorite lab mouse in the depths of Subplot 5.
He's been searching everywhere, but can't seem to find it. He's starting to think it might be in Subplot 4, where he last saw it.
Subplot 4: The Lost Mouse
Dr. Pete last saw his lab mouse in the midst of a particularly complex experiment involving Subplot 4-1: The Mysterious Cheese.
The lab mouse was last seen sniffing around a suspiciously-smelling piece of Subplot 4-1-2: The Gouda.
It's said that Dr. Pete's lab mouse was particularly fond of this exotic cheese.
Subplot 5: The Dark Alley
Legend has it that Dr. Pete last saw his lab mouse in the depths of this foreboding alleyway.