After being shot while stopping a carjacking, the Green Arrow begins acting strangely. Chloe and Clark investigate and find Oliver is taking a super drug that while healing his wound, has some dangerous side effects.

Clark is once again exposed to red kryptonite, and his "other self" goes on a rampage of sorts on Valentine's Day, kissing the women he's most attracted to and expressing his uninhibited feelings for the various relationships around him.

Lana has a stalker which leads her to an unexpected hideout. Also, Chloe has to reevaluate her feelings for Clark after she and Jimmy break up due to Jimmy's belief that she isn't really over Clark.

Clark has second thoughts about Lana marrying Lex, and Lana has the same concerns. Meanwhile, the doctor involved in the secret behind Lana's pregnancy threatens Lex with his knowledge.