This phrase suggests that there is an interesting story connected to what has just been mentioned.
इसका अर्थ यह है कि कही गई बात से जुड़ी एक दिलचस्प कहानी है।
English Usage: "She has a mysterious scar on her arm; thereby hangs a tale."
Hindi Usage: "उसके हाथ पर एक रहस्यमय निशान है; इसके पीछे एक कहानी है।"
iske peeche ek kahani hai, iske pichh ek kahani hai, iska peeche ek kahani hai, iske pichhe ek kahani hai