She is brought to Larkham Hall after being arrested for sex trafficking; she had smuggled several refugee children into the country - some of whom she herself had molested - to sell as sex slaves. During her time in prison, she also develops an intense rivalry with fellow inmate Pat Kerrigan, who was convicted of stabbing her abusive boyfriend.
During her time at Larkham, she controls virtually every criminal activity in the prison, from running numbers rackets to making and selling crystal meth. She also blackmails, intimidates and gaslights prisoners and guards alike to make them do her bidding.
In one episode, Buxton nearly escapes from prison during a furlough, while under escort by a prison officer. She attacks the officer, hand-cuffs him to a table and runs away. However, she is soon recaptured and brought back to Larkham Hall.
Her rivalry with Kerrigan finally reaches its climax when the two fight in the prison's backyard. At the end of the brutal showdown, Kerrigan strikes Buxton several times with a brick, killing her.