A NASA scientist seeks Walter's help to find the matching pair of a red stiletto left behind by a woman he met at a bar. Walter uses the stiletto as the first clue to finding the missing woman but in the process he uncovers her shocking secret that winds up putting his own life in danger. Meanwhile, Willa exposes Leo's dark family secret, but when she tries to make amends with him, she gets herself into even more legal trouble.

Isabel's new boyfriend Frank, an all-star baseball athlete, gets robbed, and Walter steps in to help find his stolen collectibles. But in the process, Walter learns Frank has lost something more meaningful than memorabilia. Then, to earn Willa's trust, Leo and Walter bring her in on the case.

Dr. Jack Hodgins from the Jeffersonian team seeks Walter's help to find evidence that could expose extraterrestrial activity. Meanwhile, Timo and Willa struggle with their arranged marriage proclaimed by the head of their gypsy family.