Chancing upon a life as a drifter and a con man, Sameer Khanna (Mashhoor Amrohi) makes his way to Singapore and lands a job working as an 'Recovery agent' for Gary Rosario (Jackie Shroff), an underground racketeer of night clubs.

Earning his livelihood by masguerading and cheating people of their money, Sameer's life takes a tumble when his own brother finds himself in need of financial help. With his Boss- Garry Rosario refusing to help him out, Sameer is left with no viable option. He comes up with a vicios plan of kidnapping the daughter of a multimillionaire super star actor, Gyaneshwar Singh (Shezed Khan) in order to solve his financial crunch.

In hi quest to relieve himself of his unavoidable misery, he promises Esha a world of dreams and leads her into believing that they are soulmates.What Sameer doesn't realize is that destiny has different plans for him, as he succumbs to the temptation of Gyaneshwar Singh's daughter Esha's (Vishakha Singh) beauty and falls head over heels for her. He takes her off to a romantic weekend on Sentosa Island, with the dual motive of spending some quality time with his newfound love and getting her away from her dad and asking him for a ransom. Seeing a beautiful possibility of living a life full of happiness with Sameer. Esha also agrees to elope with Sameer.

The repercussion of this are tremendous and never thought of, as Ghyaneshwar Singh is led to believe (by Sameer and his accomplicel best friend) that she has been kidnapped. This revelation forces him to make one phone call his best friend, Gary Rosario, who promises Gyaneshwar that his daughter will be back safe and sound that will appoint his best man to rescue Esha. The man for the job is none other than Sameer Khanna (the guy kidnapped her in the first place)

Further complications arise when Sameer gets involved in a drug deal, and in the process loses Esha to a gang of drug lords Dabar (Mukesh Rishi) and Pran Panwara (Kiran Kumar) who asks Sameer to comply with their horrendous demands in return for her life. Sameer now has to get Esha from the unscrupulous hands of Dabar and Pran Panwara (Kiran Kumar) who asks Sameer to comply with their horrendous demands in return for her life.Sameer to comply with their horrendous demands in return for her life. Sameer now has to get Esha from the unscrupulous hands of Dabar and Pran Panwara while pretending to never ever have met Esha for his life to be spared in front Gary Rosario and make all well with his finances. There is just one problem, circumstances and fate have revealed the reality of Sameer in front of Esha and she has no plans of letting him off the hook so easily. even if it means letting everyone think she's dead. Esha wants payback with Sameer while the whole world is gunning him down with Esha's presumed death. A friendship begging for generosity, a love screaming from betrayal and pride waiting to be awakened, Hum Sey Hai Jahaan is a rollercoaster ride that will jolt your senses to laughter and entertainment and will leave you asking more...