Kim has been the nanny for the Mason's since she was 16, looking after the billionaires household in the heart of London single handedly. Over the years she has become attached to the 8 year old Josh who she looks after. She sees the Masons as her own family and they have whole heartedly reciprocated the feeling. However when their older son - Liam - comes home from University he sends Kim's world in the air...will she be able to cope with the distraction?