Mass (dammute kasko) is an Action Romance based movie. In which, Ganesh (Akkineni Nagarjuna) is an orphan, who bonds well with his landlord's son Adi (Sunil).
He is behind a collegian Anjali (Jyothika) who happens to be the daughter of Vizag city's mafia don Satya (Raghuvaran). This restricts her from falling for him, as it would land him in danger but she finally gives in.
She suggests that he ties the knot immediately before her brother (Rahul Dev) and father try separating them. The gangsters in the process kill Mass's best friend Adi (Sunil) when he tries to stop them when they try separating the lead pair, before their marriage.
Ganesh (Nagarjuna) enters Vizag and settles in an apartment. After noticing the menace by Satya's henchmen, Ganesh calls up Seshu and warns him about four dates of that month - 15th, 20th, 25th and 1st (next month).
He would harm and cause damage to them for 3 dates and finally would put an end to the life of Seshu on the 1st.