Jack and the team investigate the disappearance of Stephanie (Sandra Nelson), a singer in a church choir. Stephanie's choir director informs the agents that the missing woman had been unusually emotional at the last choir practice and requested to perform a particular hymn on Sunday but then failed to show up to sing it. She initially appears to be an ordinary churchgoing woman; however, her work history, multiple moves and a conversation with her recently estranged boyfriend soon lead the team to discover Stephanie's surprising secret. Now the agents try to determine if the secret played a role in her disappearance. Meanwhile, Vivian's symptoms make it difficult to hide her heart condition from her co-workers.
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