 The series depicts the adventures of Veronica Mars ( Kristen Bell ) as she deals with life as a college student while <unk> as a private detective . In this episode , Veronica investigates when two masked men <unk> a Halloween party and steal Veronica 's necklace from Lilly Kane ( Amanda <unk> ) . Meanwhile , Keith ( Enrico Colantoni ) helps Dean O 'Dell ( Ed Begley , Jr . ) find the biological father of his stepson , the only person who can give the stepson a life @-@ saving bone marrow transplant . 
