Nancy follows the tunnel in the back of the maternity shop and sees something she shouldn't at the other end. Dean takes a new job, leaving Isabelle to live with Celia. Meanwhile, Silas flirts with Lisa, and Doug falls in love with a vision of beauty who washes up on the beach.

When Nancy is denied a share of the incoming pot by Guillermo, she decides to go over his head to Esteban. Celia discovers the cheap medication at Mexican pharmacies. Silas and Lisa get intimate, while Shane discovers some shocking photos. Andy and Doug begin interviewing for their human smuggling operation.

A spontaneous date ends in near-violence for Nancy and Esteban; Silas reveals to Lisa that he grows pot, and she makes him a tempting offer; Andy and Doug smuggle their first customer across the border; Celia develops an addiction.

Despite their busy schedules, Nancy and Esteban try to find some time for each other. After finding out about Shane's fantasies and Silas's new and much older girlfriend, Nancy also has to talk to both of her sons. With their relationship going on, Lisa and Silas add some special offerings to her cheese shop.

Nancy learns that the tunnel is being used for more than drugs. Esteban puts her fears to rest as well as her nagging headache with a strong remedy. Celia's family stages an intervention in order to force her into rehab. Andy finds Maria and takes her across the border to an awaiting Doug. Silas babysits while Shane explores new territory with his two girlfriends.

Nancy must deal with the aftermath of Shane's exploits, her Ayahuasca trip, and more confrontation with Guillermo. Celia's struggles with her rehab partner, Barry, force her to find a new rehab facility. Doug and Maria's relationship quickly goes south and they both turn to Andy for help. Meanwhile, Silas's "sandwich" business has grown too big, forcing him to turn to Nancy for help.

The DEA brings Nancy in for questioning and then she must explain things to Esteban. Celia travels deep into Mexico to make amends with estranged daughter Quinn. Meanwhile, Silas meets Lisa's ex-husband and Doug finds a reason to live. Nancy makes a shocking revelation to Esteban.