Kat is forced to take sides when a long-simmering feud explodes between Corey and Aubry. Kat's sister Karoline announces a sudden departure leaving Kat short handed at a critical time in the shop.
Kat's new shop manager Liz is all business, and while Kat likes her no nonsense approach, she rubs the LA Ink crew the wrong way. Meanwhile, Aubry's friends, former LA Ink employees Paulie and Amy struggle to get her a job at American Electric.
Kat has shocking news about her beloved cat Ludwig and is frustrated with shop manager Liz's superior attitude toward shop basics. At rival shop American Electric, Craig challenges Aubry's competence, and welcomes a long overdue visit from his brother.
Kat tattoo's rap superstar Soulja Boy and when a shop party is planned the gloves come off between shop managers Adrienne and Liz with Kat caught in the middle. Aubry struggles with her decision to remove her LA Ink tattoo.
Kat puts an end to the back stabbing between Adrienne and Liz before it gets out of hand. Meanwhile Corey's stress begins to surface in the shop. At American Electric, Craig puts Paulie's color skills to the test and Aubry considers another tattoo.
Kat lays down the law and stops the escalating battle between Adrienne and Liz for power in the shop. Aubry over steps her bounds with plan for a makeup studio at American Electric.
Kat pushes her art to a new level when she tattoos prosthetic limbs for amputees Rob & Scott and lays down the law with Corey and the team about shop policy. At AE, Paulie's tattoo client invites him to work on a music video with Snoop Dogg.
The entire shop is feeling the pressure from the mounting tension between Kat and Corey. The lack of support at Corey's band performance leaves him wondering who his real friends are. At AE, Paulie infuriates Aubry when his meeting with Corey is revealed.
Tension between Kat and Corey escalates and the shop is on edge. Liz betrays Corey and reveals details about a private conversation. Liz's on the job frustration leads her to seek out former shop manager Aubry where she reveals her true motivations.
Kat puts her photography skills to good use in support of a Battered Woman's benefit. Without Kat's authority Liz gives Corey time off and gets caught in a lie. Aubry quits her job at American Electric to follow her true passions.
Kat discovers Liz lied and Liz pays the ultimate consequence. Kat is heart broken by Corey's painful decision and their friendship is put to the ultimate test.
Corey confronts Kat and decides to quit High Voltage. Craig hires a new tattoo artist at American Electric but she and Amy get off to a bad start. Corey returns and asks Kat for his job back, forcing Kat to choose between friendship and business.
After Corey returns and asks for his job back, Kat is faced with a dilemma of hiring him back in the shop. She must consult her team and decide what's best for them all. Meanwhile, Amy and new tattoo artist Ruthless continue to be at odds.
Kat's indecision on whether or not she should bring Corey back to High Voltage. Corey is conflicted about his clients that are still in Hollywood and is getting fed up waiting on Kat to give him an answer. Corey starts to seek other options.
Kat gets caught in the middle of a prank war when her roommate, Rooftop, starts trouble with her boyfriend, Nikki Sixx. Corey cuts all ties when he crosses enemy lines and decides to join the team at American Electric.
Kat heads to New York to meet with Sephora about her new perfume line, and then to Harper Collins Publishers, where she has to give her editor some bad news about her second book. Corey reveals the ugly truth in a magazine interview.
Kat wakes up to find that a spider has bitten her eye, and the possibility of surgery scares her just as much as not being able to tattoo. Corey calms the tension at American Electric when he agrees to tattoo Amy and Paulie.
Kat convinces Michael to run a marathon, but after he drops out, she finds other ways to spend time with him. American Electric celebrates its 11th anniversary, and Paulie's refusal to participate angers Craig just as much as Amy's surprise guest.
Kat auctions off a tattoo for charity, Nikki Sixx interviews Dan on his radio show, and the crew goes to see Dan's band at The House of Blues. Corey walks in to find Aubry getting tattooed, and Amy finds herself between a rock and a hard place.
After noticing that her crew is acting strange, Kat starts digging for information only to find that she may have ruined a great surprise. At American Electric, Ruthless realizes that Amy is covering for Paulie and threatens to tell Craig.
Kat takes a long look at Corey's face on the mural and decides that it's time for a change. After an unexplained absence, Paulie returns to American Electric with a careless attitude and Craig is forced to fire him.
While Kat struggles with the decision to go on tour with Nikki and the future of their relationship, she puts Michael and Rooftop in charge of the event space next door. The tension between Amy and Ruthless reaches a boiling point over a tattoo convention
As final prep is underway for the opening of Kat's gallery, tensions boil over at AE between Amy and Ruthless. Wonderland opens its doors, Kat and her new boyfriend show up to a full press line and a party full of surprises.