26 year old FBI agent Sky Lark has lived in Gotham her whole life. Knowing the Batman personally, and helping him find the bad guys she's always getting herself involved in near death situations. And one day when she decides to go snooping on her own, she stumbles upon the Joker and his crew.
When he locks her away causing the bat to go on an obsessive mission to find her, she's under constant torture of the Joker and Harley Quinn.
But Joker begins to grow possesive over Sky, showing signs of crazed emotion and he refuses to let anyone touch her.
With him falling for her, he forces her to love him back. Letting her go, she sends him through hell only to have it back fire in her face.
But crazy can rub off on you. And she finds herself stuck with feelings she never intended to have, betraying the ones she thought to have been her closest friends and betraying all her morals.
She may fall for the Joker.