Major incident headquarters... 1500 hoursA tanker loaded with toxic chemicals is headed straight for an oil rig. The only possible outcome-disaster!Grace Darling Hospital... 1530 hoursA team, led by Dr. Seb Bridges, is ready and waiting- to save lives.Emergency room... 1600 hoursDr. Libby Bridges is on her way to the E.R., determined to ask Seb for a divorce.For Seb, only two things matter-saving lives and saving his marriage. This will be the most important night of his life and the clock is ticking.