Praacheen kaal mein ek nagar mein ek nirdhan Brahman vidhwa rehti thi. Pati ke dehant ke baad woh bhiksha maangkar bade kasht se apna aur apne ek putra ka paalan-poshan karti thi. Ek din bhiksha se lautte samay use raaste mein ek sundar, par ghaayal aur bhaybheet balak mila. Vidhwa ne daya karke use apne ghar le aayi aur apne putra ki tarah hi uska paalan karne lagi.
Woh balak vaastav mein Vidarbha desh ke parajit raja ka rajkumar Dharmagupt tha. Shatru raja ne uske pita ko maarkar rajya cheen liya tha, aur rajkumar anaath hokar bhatakte hue yahaan aa pahuncha tha. Ab vidhwa ke ghar donon balak — uska apna putra aur rajkumar Dharmagupt — saath-saath bade hone lage.
Ek din Maharishi Shandilya us vidhwa ke ghar aaye. Unhone rajkumar ka parichay aur uski vyatha jaani, aur vidhwa ko Pradosh vrat ka mahatva bataya — "Trayodashi tithi ki sandhya-bela (pradosh kaal) mein Bhagwan Shiv ki shraddha se puja karne par sab paap aur kasht door hote hain, aur manokaamna poori hoti hai." Vidhwa aur donon balak shraddha se Pradosh vrat karne lage.
Ek din donon balak van ki ore ghoomne nikle. Vahaan rajkumar Dharmagupt ki bhent ek sundar Gandharva-kanya Anshumati se hui, aur donon ek-doosre ko man hi man chaahne lage. Anshumati ke maata-pita ne, Shiv ji ki prerana se, prasannta-poorvak rajkumar se uska vivah karne ki sweekriti de di.
Pradosh vrat ke prabhav aur Bhagwan Shiv ki kripa se Gandharva-raj ki vishaal sena ne rajkumar Dharmagupt ki sahaayata ki. Dharmagupt ne shatru ko paraajit karke apna khoya hua rajya phir se prapt kiya aur Anshumati se vivah karke sukhpoorvak raaj karne laga. Apni paalanhaar vidhwa aur uske putra ko bhi usne sada sukh-samriddhi mein rakha.
Seekh: Pradosh vrat (Krishna aur Shukla — donon pakshon ki Trayodashi) Bhagwan Shiv ko atyant priya hai. Pradosh kaal mein ki gayi Shiv-aaradhana se paap nasht hote hain, sankat door hote hain aur manokaamna poori hoti hai — daya, sharan-daata bhaav aur shraddha ka phal sada shubh hota hai.