One day, The detective boys were bored so they picked up receipts in a convenience store to guess what the people are buying for dinner. Genta picks up a weird receipt with food items, a dust bin, a container, a handler light, rechargeable batteries, thin lytax gloves, and chlorine. Conan figures out the man is trying to make the same poisoned bait used to kill moles. After searching around town to the stores they visit, they find out the approximation of the man's house and begin searching for bikes with handler lights and no basket. After finding him and following him one night, they find out he was trying to poison a dog to death. His motive was to silence the vicious and loud dog so he may once again walk his favorite path in peace.