An epic animal adventure about two otter siblings, separated in a flood, and their journey to find each other again, from much-loved author Holly Webb. Sedge is the reluctant heir to the leadership of the Greenriver otter holt. His sister, Elderberry, was lost in a flash flood that washed the two tiny cubs from their home. Sedge was dragged from the river half-drowned, but Elderberry was swept away. The otters still mourn her and talk of her sweet voice and enchanting songs, and Sedge can't help feeling second best. But now it's spring again, and the river is rising dangerously once more. With the holt threatened, Sedge is convinced Elderberry is still alive - if only he's brave enough to journey downstream to find her. Silken has never felt she truly belonged in the beaver lodge.

She's too small, too weak, and her strange singing makes the practical and strong beavers feel uneasy. When she is blamed for an accident, Silken knows she will never fit in. Now she must seize her courage and venture upstream to find the one creature who can help her understand more about herself and where she really belongs. As they journey towards each other on a quest to unravel their true destinies, Sedge and Silken are drawn towards the heart of the turbulent river and its age-old song, which has the power to change all who hear its music.