If Isla Pembroke could turn back time, she knows exactly which days of her life she would change. The day she started working in the local aquarium, not knowing that she'd still be stuck there seven years later. The day her sister Morgan ran away from home. And, most of all, the day that changed everything, when her mother's death cracked her family in two. So when she's given an impossible gift - a chance to go back and relive those life-changing moments - Isla realises that she might be able to save the people she loves. But sometimes the most surprising days aren't the ones that change everything, but the ones that come after.