Diana Forest is a 23 year old woman who worked as an assassin for most of her life but after a traumatic accident she quit being an assassin and finds a job as a babysitter to a rich family which turns out to be a mafia family. Giovani de Santo is a 27 year old mafia leader and a single dad that needs a babysitter for his 2 month old daughter Aurora. Will the two of them have a good relationship? Will they find each other's secrets? Will they fall in love with each other?