Vaginal foreign body insertion is not an uncommon clinical entity; however, long-standing neglected vaginal foreign body causing vaginolith, vesicovaginal fistula and vesical calculus formation is unusual. We present a case of a neglected vaginal foreign body (plastic cap of a nail colour) leading to vesicovaginal fistula, vaginolith and vesical calculus formation in a 12-year-old female child presenting with continuous dribbling of urine per vagina. Diagnosis was confirmed on ultrasonography, non-contrast CT scan and MRI of the pelvis. The MRI demonstrated the exact size and site of the urinary bladder wall defect, besides the foreign body and the vesical calculus. The foreign body along with vaginolith and the vesical calculus were removed via suprapubic approach under general anaesthesia; the fistula was repaired by suturing the urinary bladder and vagina wall defect.