Now almost a year sober, Cassie has started fresh in LA with her supportive new boyfriend, Marco. But her side gig moonlighting as a CIA asset soon finds Cassie entangled in an international murder mystery… again.

After revealing her secret side gig to Annie and Max, Cassie sets out to find the woman who's been impersonating her – and zeros in on enigmatic new flight attendant Grace.

Cassie faces hard truths about her path to sobriety while visiting her mom as Megan attempts to reconnect with her family, who are reluctant to welcome her back.

Cassie, Shane, Annie, and Max attempt to run down clues in the string of murders – which continue to point to Cassie as the main suspect.

Cassie manages to connect the dots in a far-reaching conspiracy, while Megan tries to make amends with Shane.