The Fringe team are puzzled when a specific group of guests are targeted at a wedding.As the investigation goes the team is at a loss as to how the toxin was delivered and targeted.As they gather evidence and taken back to the lab, it’s discovered that the wedding ceremony was a testing ground for a weaponed science experiment. Adding to the intense lab investigation, Walter uncovers an alarming formula that reveals a link to a branch on the Bishop family tree. With the escalating threat of more deadly attacks and unexpected familial ties to the case, the Fringe team stops at nothing to prevent further catastrophic events.