Maddie and Haider are in their clubhouse when their first mystery knocks on their door. Marshmallow, the muddy poodle at their door is lost and needs to find her owners. Her crate fell out the back of their truck during the move and she hasn’t been able to find them. She is not sure they even know she is gone. She needs Maddie and Haider’s help! Can they help her find her owners?