A shifting panel

The panel groaned softly as it shifted, revealing a narrow, hollowed-out space built right into the stroller’s frame. Megan’s throat went dry at the sight. She had used that stroller countless times over the years and never noticed a single thing unusual. Robert slid his arm deep into the opening, his sleeve brushing against the fabric. His brow tightened with concentration as he groped around, searching carefully for something wedged and hidden deep inside the compartment.
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